EP1297027A1 - Siloxy substituted cocatalyst activators for olefin polymerization - Google Patents

Siloxy substituted cocatalyst activators for olefin polymerization

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Publication number
EP1297027A1
EP1297027A1 EP01948483A EP01948483A EP1297027A1 EP 1297027 A1 EP1297027 A1 EP 1297027A1 EP 01948483 A EP01948483 A EP 01948483A EP 01948483 A EP01948483 A EP 01948483A EP 1297027 A1 EP1297027 A1 EP 1297027A1
Authority
EP
European Patent Office
Prior art keywords
tri
siloxy
isopropyl
perfluorophenyl
dimethyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP01948483A
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German (de)
French (fr)
Inventor
George Rodriguez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Chemical Patents Inc
Original Assignee
ExxonMobil Chemical Patents Inc
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Filing date
Publication date
Priority claimed from US09/602,289 external-priority patent/US6346636B1/en
Priority claimed from US09/599,909 external-priority patent/US6541410B1/en
Application filed by ExxonMobil Chemical Patents Inc filed Critical ExxonMobil Chemical Patents Inc
Publication of EP1297027A1 publication Critical patent/EP1297027A1/en
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/643—Component covered by group C08F4/64 with a metal or compound covered by group C08F4/44 other than an organo-aluminium compound
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
    • C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not

Definitions

  • TECHNICAL FIELD This invention relates to polymerization cocatalyst compounds containing weakly coordinating Group 13 element anions and to the preparation of olefin polymers using ionic catalyst systems based on organometallic transition metal cationic compounds stabilized by these anions.
  • noncoordinating anion is now accepted terminology in olefin and vinyl monomer polymerization. See, for example, EP 0 277 003, EP 0 277 004, U.S. patent 5,198,401, U.S. patent 5,278,119, and Baird, Michael C, et al, J. Am. Chem. Soc. 1994, 116, 6435-6436.
  • the noncoordinating anions are described to function as electronic stabilizing cocatalysts, or counterions, for essentially cationic metallocene complexes that are polymerization active.
  • noncoordinating anion encompasses truly noncoordinating anions and coordinating anions that coordinate weakly enough at the insertion site to be replaced by olefinically or acetyleni- cally unsaturated monomers. These noncoordinating anions can be effectively introduced into a polymerization medium, or mixed with an organometallic catalyst before they are introduced into the polymerization medium, as Bronsted acid salts containing charge-balancing countercations. See also, the review articles by S. H. Strauss, "The Search for Larger and More Weakly Coordinating Anions", Chem. Rev., 93, 927-942 (1993).
  • Olefin solution polymerization is generally conducted in aliphatic solvents that serve to maintain reaction temperature and solvate the polymer products.
  • aryl-group-containing activators such as those having phenyl derivatives and other fused or pendant aryl-group substituents, are at best sparingly soluble in aliphatic solvents and typically are introduced in aryl solvents such as toluene. This introduces aryl-containing contaminants into the solution polymerization (and the product) that should be removed.
  • relatively insoluble catalyst components can be introduced via slurry methods, but such methods required specialized handling and pumping procedures that complicate and harms industrial scale plant design and operation.
  • Low solubility also harms low temperature operation, such as typical adia- batic processes, carried out in areas subject to low ambient temperatures. Moreover, separating or counteracting aromatic-solvent build up in the recycle system is another problem. At the same time, maintenance of high polyolefin molecular weights while operating at desired high polymerization (economically preferred) temperatures and high production rates is desired. Thus, olefin polymerization cocatalyst activators that are more aliphatic-solvent soluble particularly at elevated temperatures are desired.
  • U.S. patent 5,502,017 addresses ionic metallocene olefin polymerization catalysts containing a weakly coordinating anion comprising boron substituted with halogenated aryl substituents preferably containing silylalkyl substitu- tion, such as a t-butyldimethyl-silyl substitution.
  • Marks et al. disclose the weakly coordinating anion as the cocatalyst.
  • the silylalkyl substitution is said to increase the solubility and thermal stability of the resulting metallocene salts.
  • Examples 3-5 describes synthesis of and polymerization with the cocatalyst compound triphenylcarbe- nium tetrakis (4-dimethyl-t-butylsilyl-2, 3, 5, 6-tetrafluorophenyl) borate.
  • the cocatalyst compound triphenylcarbe- nium tetrakis (4-dimethyl-t-butylsilyl-2, 3, 5, 6-tetrafluorophenyl) borate.
  • the invention provides anion-containing cocatalyst precursors that can be combined with organometallic catalyst precursors to form active olefin polymerization catalysts.
  • Olefin polymerization can be conducted by contacting an activated catalyst with a suitable monomer or mixture of monomers, i.e. those having accessible olefinic, acetylenic, or other unsaturation.
  • the catalyst can be activated, in situ, essentially concurrent with, or before, contacting the monomer.
  • Invention catalyst sys- terns can prepare polymers and copolymers from olefinically and acetylenically unsaturated monomers.
  • Cocatalyst precursor anions [A] contain a central Group- 13 core connected to fluoroaryl ligands. At least one of the fluoroaryl ligands is substituted in its para-position (para-substituted) with a siloxy group represented by the symbols -SiOR 3 .
  • R represents one or more alkyl or alkylsilyl groups. When the ani- ons are to be used with anilinium or ammonium cations, the R-groups are secondary, or even tertiary, alkyl or alkylsilyl groups as long as the R-group's bulk does not cause steric problems.
  • Preferred invention cocatalyst activators can be represented by the following formula:
  • [Ct] + is a cation capable of abstracting an alkyl group, or breaking a carbon- metal connection from organometallic compounds containing that type of connection. Such a cation is known as an activating cation.
  • M is a Group- 13 element, preferably boron or aluminum
  • ArF is a fluorinated aryl group
  • each R is independently selected from CrC 30 hydrocarbyl or hydrocarbylsilyl substituents, preferably attached to the Si atom through a secondary or tertiary carbon atom.
  • Exemplary ArF ligands and substituents specifically include fluorinated aryl groups, preferably perfluorinated aryl groups, and include substituted ArF groups having substituents other than the fluorine substitution, such as fluorinated hydrocarbyl groups.
  • Preferred fluorinated aryl groups include phenyl, biphenyl, napthyl, inde- nyl, fluorenyl, anthracenyl, pyrenyl, and their derivatives.
  • patents 5,198,401, 5,296,433, 5,278,119, 5,447,895, 5,688,634, 5,895,771, WO 93/02099, WO 97/29845, WO 99/43717, and WO 99/42467 are particularly instructive as to suitable ArF chemical groups.
  • one-third of the hydrogen atoms on aromatic-ligand carbon atoms are replaced by fluorine atoms, and, in other embodiments, the aryl ligands are perfluorinated.
  • Perfluorinated means that each aryl hydrogen atom, unless substituted with an invention siloxy substituent, is substituted with fluorine or fiuorocarbyl substituents, e.g., trifluoromethyl.
  • the term "perfluorinated” also encompasses those aryl ligands in which all but one hydrogen atom in the para position is replaced with fluorine and the para-position hydrogen is replaced with an invention siloxy group.
  • any of the defined R groups will be effective for olefin polymerization such as by solution, bulk, slurry and gas-phase processes.
  • exemplary R groups include methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, cyclohexyl, benzyl, methyltrimethylsilyl, methyltriethylsilyl, etc.
  • the R groups may be the same or different; in other words, mixed alkyl groups may be located on the siloxy silicon.
  • each R is a C 1-20 hydrocarbyl or hydrocarbylsilyl substituent, attached to the Si of the -O-Si- group using a secondary or tertiary carbon.
  • Tertiary- carbon-containing substituents can be advantageously employed where the other R groups are less bulky, that is lower alkyl (CrC4) primary or secondary alkyl substitu- ents, to minimize steric hindrance.
  • the R groups must be bulky enough to inhibit reaction between the siloxy group and the activated catalyst.
  • Effective solubility means soluble enough to provided aliphatic-dissolved cocatalyst that is concentrated enough to activate industrially useful amounts of organometallic catalyst compounds without using slurries or aromatic solvents. For example, the selection of C 2 or higher carbon- number alkyl or silylalkyl groups on the silicon atom, provides effective solubility.
  • Effective cations can be any of those capable of abstracting monoanionic hydride, alkyl, or other hydrocarbyl or hydrocarbylsilyl ligands from organometallic polymerization catalysts, or cutting covalent metal-carbon ⁇ or ⁇ bonds in such catalysts. These are referred to as activating cations.
  • the cation essentially doesn't interfere with the ionic catalyst complexes formed from the catalyst precursor compounds.
  • Suitable cations include nitrogen-containing cations such as the anilinium and ammonium salts of U.S.
  • hydrocarbyl, hydrocarbyl-amine, hydrocarbyl-silyl, CrC 20 , and Group- 1,-2,-11 and -12-based cations are suitable.
  • An example of a hydrocarbyl-amine is N- pentafluorophenyl pyrrolidinium.
  • cocatalysts may be prepared by synthetic methods as known in the art. In a typical procedure, bromo-tetrafluorophenol is converted to its siloxy- substituted counterpart by reacting it with a strong base such as potassium hydride. After that reaction, the resulting phenoxide is reacted with a trialkylchlorosilane. The reaction product is then reacted with BuLi and an appropriate amount of a boron or aluminum trihalide. The resulting lithium salt can then be converted to an activating cocatalyst salt by cation exchange with a halide salt, for example anilinium or ammonium salts. This reaction sequence is illustrated below.
  • Organometallic precursors compounds suitable as olefin polymerization catalysts by coordination or insertion polymerization will include the known organometallic, transition metal compounds useful in traditional Ziegler-Natta coordination polymerization, particularly the metallocene compounds known to be useful in coordination polymerization, when such compounds are capable of catalytic activation by the cocatalyst activators described for the invention. These will typically include Group-3-10 transition metal compounds containing at least one metal ligand abstrac- table by the cocatalyst activators, e.g., hydride, hydrocarbyl, and hydrocarbylsilyl, and lower alkyl-substituted (Cj-Qo) derivatives of those.
  • the cocatalyst activators e.g., hydride, hydrocarbyl, and hydrocarbylsilyl, and lower alkyl-substituted (Cj-Qo) derivatives of those.
  • Examples include hydride, methyl, benzyl, dimethyl-butadiene, etc.
  • Abstractable ligands and transition metal compounds comprising them include those metallocenes described in the background art, see for example US patents 5,198,401 and WO 92/00333. Syntheses of these compounds is well known from the published literature.
  • the metal ligands include non-abstractable halogen, amido, or alkoxy ligands (for example, biscyclopentadienyl zirconium dichloride), which do not allow for ready abstraction with the invention cocatalysts
  • the ligands can be converted into abstractable ones via known alkylation reactions with organometallic compounds such as lithium or aluminum hydrides or alkyls, alkylalumoxanes, Grignard reagents, etc. This treatment also modifies the ligand to facilitate olefin insertion during polymerization. See also EP 0 500 944 and EP 0 570 982 for the reaction of organoaluminum compounds with dihalo-substituted metallocene compounds before adding activators.
  • Suitable metallocene compounds are those that are activable into a cationic catalyst by a ligand abstraction. In addition to containing abstractable ligands, the metallocene can alter- natively contain ligands that are made abstractable by alkylating the metallocene.
  • metallocenes or metallocene compounds mean mono- or biscyclopen- tadienyl-substituted Group-3, -4, -5, or -6 transition metal compounds in which the ancillary ligands may be substituted with one or more groups and may be bridged to each other, or through a heteroatom to the transition metal.
  • ancillary ligands are Cp ligands, bridges between Cp ligands, or other coordinating ligands not directly involved in the polymerization reaction.
  • Ancillary ligands in general, control the ster- ics and environment around the metal center. It is believed that ancillary ligands are not abstracted to activate the metal center.
  • ancillary ligands are not subject to monoolefin insertion into the ancillary ligand/metal center bond during the polymerization reaction).
  • These ligands and bridging elements' size and constituency should be selected in the literature-described manner to enhance the desired polymerization activity and characteristics.
  • the cyclo- pentadienyl rings when bridged to each other, will be lower-alky 1-substituted (C ⁇ -C 6 ) in the 2 position (with or without a similar 4-position substituent in the fused ring systems) and can additionally comprise alkyl, cycloalkyl, aryl, alkylaryl, or arylalkyl substituents, the latter as linear, branched, or cyclic structures including multi-ring structures, for example, those of U.S.
  • metallocene compounds suitable for polyethylene or ethylene- containing copolymers are essentially any of those known in the art, see again WO-A-92/00333 and U.S. patents 5,001,205, 5,198,401, 5,324,800, 5,304,614 and 5,308,816, for spe- cific listings. Selecting and making isotactic or syndiotactic polypropylene-producing metallocenes, see for example Journal of Organometallic Chemistry, 369, 359-370 (1989). Typically those catalysts are stereorigid asymmetric, chiral or bridged chiral metallocenes. See, for example, U.S.
  • Mc is a Group— 3-6 metal.
  • L A is a substituted or unsubstituted cy- clopentadienyl ligand connected to Mc.
  • L B is a member of the ligands class defined for L A of L B is heteroatom ligand, designated J, which is connected to Mc.
  • the L A and L ligands may bridge or connect each other through one or more Group— 13— 16 element-containing linking groups.
  • D and E are independent labile ligands connected to Mc. D & E are optionally bridged to each other or L or L B .
  • Substituted cyclopentadienyl structures means that one or more hydrogen atoms is replaced with hydrocarbyl, hydrocarbylsilyl, or similar heteroatom-containing structures.
  • the hydrocarbyl structures specifically include C 1 -C 30 linear, branched, cyclic alkyl and cycloaromatic fused and pendent rings. These rings may also be substituted with similar structures.
  • Non-limiting representative metallocene compounds include mono- cyclopentadienyl compounds such as pentamethylcyclopentadienyltitanium isopro- poxide, pentamethylcyclopentadienyltribenzyl titanium, dimethylsilyltetramethyl- cyclopentadienyl-tert-butylamido titanium dichloride, pentamethylcyclopentadienyl titanium trimethyl, dimethylsilyltetramethylcyclopentadienyl-tert-butylamido zircco- nium dimethyl, dimethylsilyltetramethylcyclopentadienyl-dodecylamido hafnium di- hydride, dimethylsilyltetramethylcyclopentadienyl-dodecylamido hafnium dimethyl, unbridged biscyclopentadienyl compounds such as bis( 1,3 -butyl, methylcyclopentad
  • aliphatic solvent-soluble pre- cursor compounds e.g., bis ⁇ r ⁇ -triethylsilyl-phenyl) methylene (2, 7-(di-tert-butyl) fluorenyl)(cyclopentadienyl) hafnium dimethyl
  • solubilizing effect of the aliphatic solvent-soluble anion compounds of the invention will tend to offset poor solubility for typical organometallic compound cations useful in olefin polymerization. See copending applications U.S. serial numbers 09/426,099, filed 22 October 1999, and 09/194,595 filed October 1999 for background as to soluble catalysts and specific metallocene and precursor cocatalyst cations useful with the current invention.
  • Representative traditional Ziegler-Natta transition metal compounds include tetrabenzyl zirconium, tetra bis(trimethylsiylmethyl) zirconium, oxo- tris(trimethlsilylmethyl) vanadium, tetrabenzyl hafnium, tetrabenzyl titanium, bis(hexamethyl disilazido)dimethyl titanium, tris(trimethyl silyl methyl) niobium dichloride, tris(trimethylsilylmethyl) tantalum dichloride.
  • the important features of such compositions for coordination polymerization are the abstractable ligand and that ligand into which the ethylene (olefinic) group can be inserted. These features enable ligand abstraction from the transition metal compound and the concomitant formation of the invention catalysts.
  • Additional organometallic transition metal compounds suitable as olefin polymerization catalysts in accordance with the invention will be any of those Group 3-10 that can be converted by ligand abstraction or bond scission into a catalytically active cation and that can be stabilized or charge balanced in that active state by a noncoordinating or weakly coordinating anion.
  • the non-coordinating anion should be sufficiently labile to be displaced by an olefinically unsaturated monomer such as ethylene.
  • Exemplary compounds include those described in the patent literature.
  • U.S. patent 5,318,935 describes bridged and unbridged, bisamido catalyst compounds of Group-4 metals capable of ⁇ -olefins polymerization.
  • Bridged bis(arylamido) Group-4 compounds for olefin polymerization are described by D. H. McConville. et al., in Organometallics 1995, 14, 5478-5480. Synthetic methods and compound characterization are presented. Further work appearing in D. H. McConville, et al, Macromolecules 1996, 29, 5241-5243, describes bridged bis(arylamido) Group-4 compounds that are polymerization catalysts for 1-hexene. Additional invention-suitable transition metal compounds include those described in WO 96/40805.
  • Cationic Group-3- or Lanthanide-metal olefin polymerization complexes are disclosed in copending U.S. application Ser. No. 09/408050. (Filed 29 September 1999).
  • a monoanionic bidentate ligand and two monoanionic ligands stabilize those catalyst precursors, which are activable with invention ionic cocatalysts.
  • Compounds that contain abstractable ligands or that can be alkylated to contain abstractable ligands are suitable for the practice of this invention. See, for instance, V. C. Gibson, et al; "The Search for New-Generation Olefin Polymerization Catalysts: Life Beyond Metallocenes", Angew. Chem. Int. Ed, 38, 428-447 (1999).
  • the catalyst system will generally employ one or more scavenging agents to remove polar impurities from the reaction environment and to increase catalyst activity.
  • Polar impurities include water, oxygen, metal impurities, etc.
  • these impurities are removed from or reduced in the reaction components before the components enter the reaction vessel. Impurities can be removed by chemically treating the components or by impurity-separation steps. Such treatment or separation can occur during or after component synthesis.
  • the polymerization process will normally employ minor scavenging agent amounts. Typically, these scavengers will be organometallic such as the Group-13 compounds of U.S.
  • Exemplary compounds include triethyl aluminum, triethyl bo- rane, triisobutyl aluminum, methylalumoxane, and isobutyl alumoxane.
  • compounds having bulky or C6-C20 linear hydrocarbyl substituents con- nected to the metal or metalloid center are used because they coordinate to the active catalyst more weakly.
  • Examples include triethylaluminum; bulky compounds, such as triisobutylaluminum; triisoprenylaluminum, and long-chain, linear-alkyl- substituted aluminum compounds, such as tri-n-hexylaluminum, tri-n-octylaluminum, or tri-n-dodecylaluminum.
  • alumoxane is used as the activator, any excess over that needed to activate the catalyst can act as a scavenger and additional organometallic scavengers may be unnecessary.
  • Alumoxanes also may be used as scavengers with other activators, e.g., methylalumoxane and triisobutyl-alumoxane with boron-based activators.
  • the scavenger amount is limited to that amount effective to enhance activity (and with that amount necessary for activation when used in a dual role) since excess amounts can poison the catalyst
  • Invention catalyst systems can polymerize unsaturated molecules that are conventionally recognized as metallocene polymerizable. Typical conditions include solution, slurry, gas-phase, and high-pressure polymerization.
  • the catalysts may be supported, such as on inorganic oxide or polymeric supports and as such will be use- ful in those operating modes employing fixed-bed, moving-bed, fluid-bed, slurry, or solution processes conducted in single, series, or parallel reactors.
  • Invention cocata- lysts can also function in catalyst pre-polymerization.
  • WO 98/55518 describes an invention support method for gas-phase or slurry polymerization.
  • invention olefin polymerization methods employ the catalyst system in liquid phase (solution, slurry, suspension, bulk phase, or combi- nations thereof), in high-pressure liquid or supercritical fluid phase, or in gas phase.
  • the liquid processes comprise contacting olefin molecules with the catalyst system in a suitable diluent or solvent and allowing those molecules to react long enough to produce the invention polymers.
  • the term polymer encompasses both homo- and co- polymers.
  • Both aliphatic and aromatic hydrocarbyl solvents are suitable, e.g., hexane.
  • the supported catalysts In bulk and slurry processes, the supported catalysts typically contact a liquid monomer slurry. Gas-phase processes use a supported catalyst and follow any manner suitable for ethylene polymerization. Illustrative examples may be found in U.S. Patents 4,543,399; 4,588,790; 5,028,670; 5,382,638; 5352,749; 5,408,017; 5,436,304; 5,453,471; and 5,463,999; 5,767,208; and WO 95/07942.
  • the minimum polymerization reaction temperature is 40°C. In others, the minimum reaction temperature is 60°C. In some embodiments, the temperature can go as high as 250°C. In others, the temperature does not exceed 220°C. In some embodiments, the minimum reaction pressure is 1 mm Hg; in others, 0.1 bar, and in yet others, 1.0 bar. In some embodiments, the maximum pressure is less than or equal to 2500 bar, in others, 1600 bar or lower, and in yet others, 500 bar or less.
  • Embodiments of the invention are suitable for solution polymerization with bridged fluorenyl metallocene hafnium compounds coupled with naphthyi-group- containing, non-coordinating anions at polymerization temperatures > 110 °C, for elastomeric olefin copolymers, and, between 160 °C and 250 °C for plastomeric eth- ylene copolymers.
  • Linear polyethylene including high and ultra-high molecular weight poly- ethylenes, including both homo- and copolymers with other alpha-olefin monomers, alpha-olefmic or non-conjugated diolefms, for example, C 3 -C 20 olefins, diolef ⁇ ns or cyclic olefins, are produced by adding ethylene, and optionally one or more of the other monomers, to a reaction vessel under low pressure (typically ⁇ 50 bar), at a typical temperature of 40-250 °C with the invention catalyst that has been slurried with a solvent, such as hexane or toluene. Cooling typically removes polymerization heat.
  • a solvent such as hexane or toluene. Cooling typically removes polymerization heat.
  • Gas-phase polymerization can be conducted, for example, in a continuous fluid bed gas-phase reactor operated at 2000-3000 kPa and 60-160 °C, using hydrogen as a reaction modifier (100-200 PPM), C 4 -C 8 comonomer feedstreams (0.5-1.2 mol%), and C 2 feedstreams (25-35 mol%).
  • Ethylene- ⁇ -olefin (including ethylene-cyclic olefin and ethylene- ⁇ -olefin- diolefin) elastomers of high molecular weight and low crystallinity can be prepared using invention catalysts.
  • This preparation uses traditional solution polymerization processes or processes that introduce ethylene into a slurry.
  • the slurry is made up of
  • the slurry also can contain other (un)polymerizable components that act as polymerization diluents and that suspend the catalyst (system).
  • Typical ethylene pressures will be between 10 and 1000 psig (69-6895 kPa), and the polymerization diluent temperature typically re- mains between 40 and 160 °C.
  • the process can be carried out in one or more stirred tank reactors, operated in series or parallel.
  • olefinically unsaturated monomers can also be polymerized using invention catalysts, for example, styrene, alkyl-substituted styrenes, isobutylene, and other geminally disubstituted olefins, ethylidene norbornene, norbornadiene, dicyclo- pentadiene, and other olefinically-unsaturated monomers, including other cyclic olefins, such as cyclopentene, norbornene, alkyl-substituted norbornenes, -end vinyl- group-containing polar monomers capable of coordinating polymerization. See, for example, U.S.
  • Patents 5,635,573, 5,763,556, and WO 99/30822 are also be copolymerized yielding branch-containing olefin polymers.
  • oligomerization, dimerization, hydrogenation, ole- fm/carbon monoxide copolymerization, hydroformulation, hydrosilation, hydroami- nation and related catalytic reactions employing organometallic cationic complexes can be accomplished using invention cocatalyst complexes with organometallic compounds suitably selected as known in the art.
  • Invention catalyst compositions can be used as described above individually for coordination polymerization or can be mixed with other olefin polymerization catalyst compounds to prepare polymer blends. Monomer and catalyst selection allows blends preparation under conditions analogous to those using individual catalyst compositions. Polymers having increased MWD for improved processing and other traditional benefits available from mixed-catalyst-system polymers can thus be achieved.
  • Blended polymers can be formed ex situ using mechanical blending or in situ using mixed catalyst systems. In situ blending seems to provide a more homogeneous product and allows one-step blend production. In situ blending involves combining more than one catalyst (i.e. a mixed catalyst system) in a reactor to simultane- ously prepare multiple polymer products. This method requires additional catalyst synthesis. Mixed catalyst systems require catalyst actives to be matched. Furthermore, the polymers the catalysts produce at specific conditions and the catalyst response to changed polymerization conditions must be matched, as well.
  • Some embodiments take the form of a catalyst composition for olefin po- lymerization.
  • This composition is the reaction product of an organometallic catalyst having at least one stabilizing ligand and a labile ligand into which olefins can insert and a cocatalyst comprising a cation [Ct] and an anion [A] " .
  • the cocatalyst anion comprises a Group-13 element connected to at least one independently selected fluoroaryl ligand that is para-substituted with a siloxy group.
  • the siloxy group are repre- sented by the symbols -SiOR 3 , and each R is independently a -C 30 hydrocarbyl or hydrocarbylsilyl substituent.
  • the cocatalyst has the following formula: [CtJ + [M(ArF) n ((ArF)OSiR 3 ) 4 -n] " .
  • [Ct] + is an activating cation
  • M is boron or aluminum
  • ArF are each independently fluoroaryl groups with at least one fluorine substitution
  • R are each independently -C 20 hydrocarbyl or hydrocarbylsilyl substituent.
  • R attaches to the Si atom through a secondary or tertiary carbon atom.
  • at least one fluorinated aryl group is perfluorinated.
  • each fluorinated aryl group is perfluorinated.
  • the composition has [Ct] + equal to one of anilinium ca- tions, ammonium cations, trityl carbenium cations, Group- 11 metal cations, silylium cations, hydrated Group-1 or -2 salt cations, and derivatives of anilinium, ammonium, trityl carbenium, and silylium cations containing -C20 hydrocarbyl, hydrocarbylsilyl, or hydrocarbylamine substitutions for one or more hydrogen atoms on the cations.
  • the organometallic catalyst portion is a Group-3- 10 metal compound activable to a monovalent cation for olefin polymerization.
  • the organometallic catalyst portion is a Group-3 -6 metal compound activable to a monovalent cation for olefin polymerization, which has the following formula: L L L C i McDE.
  • L A is a (un)substituted cyclopentadienyl or heterocyclopentadienyl ligand connected to Mc
  • L B is a member of L A ligands, or is J, a heteroatom ligand connected to Mc, optionally, L A and L B are linked through a Group-13-16-element-containing group
  • L C j is an optional neutral, non-oxidizing ligand connected to Mc, i equals 0-3, Mc is a Group-3 -6 metal
  • D and E are independently labile ligands, optionally bridged to each other or to L A or L B , with a metal-carbon connection to Mc that can be broken by invention cocatalyst and into which a polymerizable monomer or mac- romer can insert for polymerization.
  • Mc is titanium and L B is a heteroatom ligand, J, connected to Mc.
  • Mc is zirconium or hafnium and L B is independently a substituted or unsubstituted cyclopentadienyl or heterocyclopentadienyl ligand connected to Mc.
  • the invention take the form of a process for preparing polyolefins from one or more olefinic monomers comprising combining the olefins under polymerization conditions with a catalyst system, as described above.
  • the catalyst system contains an activable Group-3- 10 organometallic catalyst for olefin polymerization.
  • Some invention process embodiments include polymerization conditions that comprise solution, supercritical pressure, bulk, slurry, or gas phase processes conducted at reaction temperatures from 30-300 °C and pressures from 0-2000 bar. Some embodiments use adiabatic solution techniques at reaction temperatures from
  • invention embodiments can be unsupported or the activated organometallic complex is carried on or affixed to a particulate support material. Moreover, the complex can be affixed to the support before, during, or after activation.
  • Some invention embodiments use olefinic monomers selected from ethylene, C 3 -C 20 olefins, C 5 -C 2 o diolefins, C -C 2 o vinyl aromatic monomers, C 4 -C 20 gemi- nally disubstituted olefins, or C 5 -C 20 cyclic olefins.
  • fluorenyl hafnium dihydride; [tri-N-octylammonium] + [(5- ⁇ (triethylsilylethyl)isopropylnonylsiloxy ⁇ erfluoronapth-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (5,6,7, 8-tetrafluoronaphthyl)borate]7 bis(4-
  • Ethylene and propylene were copolymerized in a 2 liter, continuous stirred tank reactor operating at 100° C using bisf ⁇ r ⁇ -triethylsilyl-phenyl) methylene (2, 7- (di-tert-butyl) fluorenyl) (cyclopentadienyl) hafnium dimethyl as the metallocene catalyst.
  • the compound of Example 3 was the cocatalyst activator.
  • Runs 1 and 2 of Tables la and lb are representative. For Run 1, the catalyst system was preactivated in toluene. For Run 2, the catalyst system was preactivated in hexane.
  • the collection times listed on Table 1 ("Time") refer to the time after which the polymer solutions were collected.

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Abstract

This description addresses ionic compositions of matter comprising positively charged cations [Ct]+ and negatively charged anions [A]-, said anion comprising a central core Group 13 element to which are bound fluoroaryl ligands, at least one of said fluoroaryl ligands being substituted with a siloxy group represented by the symbols -SiOR¿3?, wherein R is a C1-C30 hydrocarbyl or hydrocarbylsilyl substituent. [Ct]?+¿ may be selected from any capable of use with olefin polymerization catalysts and typically will be from the group consisting of anilinium and ammonium cations, trityl carbenium cations, Group 11 metal cations, silylium cations, the cations of the hydrated salts of Group 1 or 2 metals, and derivatives of the foregoing anilinium, ammonium, trityl carbenium, and silylium cations containing C¿1?-C20 hydrocarbyl, hydrocarbylsilyl, or hydrocarbylamine subtituents for one or more hydrogen atoms of said cations. The ionic compositions described can be used to activate olefin polymerization catalysts, and can be prepared so as to be soluble in aliphatic solvents. Syntheses and polymerization are illustrated.

Description

TITLE: SILOXY SUBSTITUTED COCATALYST ACTIVATORS FOR
OLEFIN POLYMERIZATION
TECHNICAL FIELD This invention relates to polymerization cocatalyst compounds containing weakly coordinating Group 13 element anions and to the preparation of olefin polymers using ionic catalyst systems based on organometallic transition metal cationic compounds stabilized by these anions.
BACKGROUND ART The term "noncoordinating anion" is now accepted terminology in olefin and vinyl monomer polymerization. See, for example, EP 0 277 003, EP 0 277 004, U.S. patent 5,198,401, U.S. patent 5,278,119, and Baird, Michael C, et al, J. Am. Chem. Soc. 1994, 116, 6435-6436. The noncoordinating anions are described to function as electronic stabilizing cocatalysts, or counterions, for essentially cationic metallocene complexes that are polymerization active. The term noncoordinating anion encompasses truly noncoordinating anions and coordinating anions that coordinate weakly enough at the insertion site to be replaced by olefinically or acetyleni- cally unsaturated monomers. These noncoordinating anions can be effectively introduced into a polymerization medium, or mixed with an organometallic catalyst before they are introduced into the polymerization medium, as Bronsted acid salts containing charge-balancing countercations. See also, the review articles by S. H. Strauss, "The Search for Larger and More Weakly Coordinating Anions", Chem. Rev., 93, 927-942 (1993).
Olefin solution polymerization is generally conducted in aliphatic solvents that serve to maintain reaction temperature and solvate the polymer products. But aryl-group-containing activators, such as those having phenyl derivatives and other fused or pendant aryl-group substituents, are at best sparingly soluble in aliphatic solvents and typically are introduced in aryl solvents such as toluene. This introduces aryl-containing contaminants into the solution polymerization (and the product) that should be removed. Alternatively, relatively insoluble catalyst components can be introduced via slurry methods, but such methods required specialized handling and pumping procedures that complicate and harms industrial scale plant design and operation. Low solubility also harms low temperature operation, such as typical adia- batic processes, carried out in areas subject to low ambient temperatures. Moreover, separating or counteracting aromatic-solvent build up in the recycle system is another problem. At the same time, maintenance of high polyolefin molecular weights while operating at desired high polymerization (economically preferred) temperatures and high production rates is desired. Thus, olefin polymerization cocatalyst activators that are more aliphatic-solvent soluble particularly at elevated temperatures are desired.
U.S. patent 5,502,017, to Marks et al, addresses ionic metallocene olefin polymerization catalysts containing a weakly coordinating anion comprising boron substituted with halogenated aryl substituents preferably containing silylalkyl substitu- tion, such as a t-butyldimethyl-silyl substitution. Marks et al. disclose the weakly coordinating anion as the cocatalyst. The silylalkyl substitution is said to increase the solubility and thermal stability of the resulting metallocene salts. Examples 3-5 describes synthesis of and polymerization with the cocatalyst compound triphenylcarbe- nium tetrakis (4-dimethyl-t-butylsilyl-2, 3, 5, 6-tetrafluorophenyl) borate. In view of the above, there is a continuing need for activating cocatalyst compounds both to improve the industrial economics of solution polymerization and to provide alternative activators for olefin polymerization catalyst systems.
BRIEF SUMMARY
The invention provides anion-containing cocatalyst precursors that can be combined with organometallic catalyst precursors to form active olefin polymerization catalysts. Olefin polymerization can be conducted by contacting an activated catalyst with a suitable monomer or mixture of monomers, i.e. those having accessible olefinic, acetylenic, or other unsaturation. The catalyst can be activated, in situ, essentially concurrent with, or before, contacting the monomer. Invention catalyst sys- terns can prepare polymers and copolymers from olefinically and acetylenically unsaturated monomers. Cocatalyst precursor anions [A]" contain a central Group- 13 core connected to fluoroaryl ligands. At least one of the fluoroaryl ligands is substituted in its para-position (para-substituted) with a siloxy group represented by the symbols -SiOR3. R represents one or more alkyl or alkylsilyl groups. When the ani- ons are to be used with anilinium or ammonium cations, the R-groups are secondary, or even tertiary, alkyl or alkylsilyl groups as long as the R-group's bulk does not cause steric problems. Preferred invention cocatalyst activators can be represented by the following formula:
[Ct]+ [M(ArF)n((ArF)OSiR3)4-n]\ where [Ct]+ is a cation capable of abstracting an alkyl group, or breaking a carbon- metal connection from organometallic compounds containing that type of connection. Such a cation is known as an activating cation. M is a Group- 13 element, preferably boron or aluminum, ArF is a fluorinated aryl group, and each R is independently selected from CrC30 hydrocarbyl or hydrocarbylsilyl substituents, preferably attached to the Si atom through a secondary or tertiary carbon atom. DETAILED DESCRIPTION
Exemplary ArF ligands and substituents specifically include fluorinated aryl groups, preferably perfluorinated aryl groups, and include substituted ArF groups having substituents other than the fluorine substitution, such as fluorinated hydrocarbyl groups. Preferred fluorinated aryl groups include phenyl, biphenyl, napthyl, inde- nyl, fluorenyl, anthracenyl, pyrenyl, and their derivatives. The disclosures of U.S. patents 5,198,401, 5,296,433, 5,278,119, 5,447,895, 5,688,634, 5,895,771, WO 93/02099, WO 97/29845, WO 99/43717, and WO 99/42467 are particularly instructive as to suitable ArF chemical groups. In some embodiments, one-third of the hydrogen atoms on aromatic-ligand carbon atoms are replaced by fluorine atoms, and, in other embodiments, the aryl ligands are perfluorinated. Perfluorinated means that each aryl hydrogen atom, unless substituted with an invention siloxy substituent, is substituted with fluorine or fiuorocarbyl substituents, e.g., trifluoromethyl. The term "perfluorinated" also encompasses those aryl ligands in which all but one hydrogen atom in the para position is replaced with fluorine and the para-position hydrogen is replaced with an invention siloxy group.
The chart below shows additional suitable size ligands.
Essentially any of the defined R groups will be effective for olefin polymerization such as by solution, bulk, slurry and gas-phase processes. Exemplary R groups include methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, cyclohexyl, benzyl, methyltrimethylsilyl, methyltriethylsilyl, etc. The R groups may be the same or different; in other words, mixed alkyl groups may be located on the siloxy silicon. In some embodiments, each R is a C1-20 hydrocarbyl or hydrocarbylsilyl substituent, attached to the Si of the -O-Si- group using a secondary or tertiary carbon. Tertiary- carbon-containing substituents can be advantageously employed where the other R groups are less bulky, that is lower alkyl (CrC4) primary or secondary alkyl substitu- ents, to minimize steric hindrance. Counter to this, the R groups must be bulky enough to inhibit reaction between the siloxy group and the activated catalyst.
Selecting R such that the cocatalyst anion is effectively soluble in aliphatic solvent is particular advantageous. "Effective solubility", and equivalent phraseology, means soluble enough to provided aliphatic-dissolved cocatalyst that is concentrated enough to activate industrially useful amounts of organometallic catalyst compounds without using slurries or aromatic solvents. For example, the selection of C2 or higher carbon- number alkyl or silylalkyl groups on the silicon atom, provides effective solubility.
Effective cations (Ct+) can be any of those capable of abstracting monoanionic hydride, alkyl, or other hydrocarbyl or hydrocarbylsilyl ligands from organometallic polymerization catalysts, or cutting covalent metal-carbon η or η bonds in such catalysts. These are referred to as activating cations. Preferably, the cation essentially doesn't interfere with the ionic catalyst complexes formed from the catalyst precursor compounds. Suitable cations include nitrogen-containing cations such as the anilinium and ammonium salts of U.S. patent 5,198,401, and WO 97/35893, the trityl carbenium cations of US patent 5,387,568, metal cations, e.g., Ag+, the silylium cations of WO 96/08519, and hydrated Group-1 or -2 metal cations of US patent 5,767,208. Additionally, suitable cations include nitrogen- and carbon-based cations described in WO 97/35893, and in copending U.S. applications serial nos. 09/694,595, (filing date 22 October 1999), and 09/734,296 (filing date 9 December
1999). Thus hydrocarbyl, hydrocarbyl-amine, hydrocarbyl-silyl, CrC20, and Group- 1,-2,-11 and -12-based cations are suitable. An example of a hydrocarbyl-amine is N- pentafluorophenyl pyrrolidinium.
Invention cocatalysts may be prepared by synthetic methods as known in the art. In a typical procedure, bromo-tetrafluorophenol is converted to its siloxy- substituted counterpart by reacting it with a strong base such as potassium hydride. After that reaction, the resulting phenoxide is reacted with a trialkylchlorosilane. The reaction product is then reacted with BuLi and an appropriate amount of a boron or aluminum trihalide. The resulting lithium salt can then be converted to an activating cocatalyst salt by cation exchange with a halide salt, for example anilinium or ammonium salts. This reaction sequence is illustrated below.
Organometallic precursors compounds suitable as olefin polymerization catalysts by coordination or insertion polymerization will include the known organometallic, transition metal compounds useful in traditional Ziegler-Natta coordination polymerization, particularly the metallocene compounds known to be useful in coordination polymerization, when such compounds are capable of catalytic activation by the cocatalyst activators described for the invention. These will typically include Group-3-10 transition metal compounds containing at least one metal ligand abstrac- table by the cocatalyst activators, e.g., hydride, hydrocarbyl, and hydrocarbylsilyl, and lower alkyl-substituted (Cj-Qo) derivatives of those. Examples include hydride, methyl, benzyl, dimethyl-butadiene, etc. Abstractable ligands and transition metal compounds comprising them include those metallocenes described in the background art, see for example US patents 5,198,401 and WO 92/00333. Syntheses of these compounds is well known from the published literature. Additionally, -where the metal ligands include non-abstractable halogen, amido, or alkoxy ligands (for example, biscyclopentadienyl zirconium dichloride), which do not allow for ready abstraction with the invention cocatalysts, the ligands can be converted into abstractable ones via known alkylation reactions with organometallic compounds such as lithium or aluminum hydrides or alkyls, alkylalumoxanes, Grignard reagents, etc. This treatment also modifies the ligand to facilitate olefin insertion during polymerization. See also EP 0 500 944 and EP 0 570 982 for the reaction of organoaluminum compounds with dihalo-substituted metallocene compounds before adding activators.
The patent literature describes yet other metallocene compounds suitable for use in this invention, and with invention activators, e.g., EP-A-0 129 368, US patents
4,871,705, 4,937,299, 5,324,800, 5,470,993, 5,491,246, 5,512,693, EP-A-0 418 044, EP-A-0 591 756, WO-A-92/00333, WO-A-94/01471 and WO 97/22635. Suitable metallocene compounds are those that are activable into a cationic catalyst by a ligand abstraction. In addition to containing abstractable ligands, the metallocene can alter- natively contain ligands that are made abstractable by alkylating the metallocene. For this invention, metallocenes or metallocene compounds mean mono- or biscyclopen- tadienyl-substituted Group-3, -4, -5, or -6 transition metal compounds in which the ancillary ligands may be substituted with one or more groups and may be bridged to each other, or through a heteroatom to the transition metal. (Ancillary ligands are Cp ligands, bridges between Cp ligands, or other coordinating ligands not directly involved in the polymerization reaction. Ancillary ligands, in general, control the ster- ics and environment around the metal center. It is believed that ancillary ligands are not abstracted to activate the metal center. Moreover, it is believed that ancillary ligands are not subject to monoolefin insertion into the ancillary ligand/metal center bond during the polymerization reaction). These ligands and bridging elements' size and constituency should be selected in the literature-described manner to enhance the desired polymerization activity and characteristics. In some embodiments, the cyclo- pentadienyl rings (including substituted cyclopentadienyl-based, fused ring systems, such as indenyl, fiuorenyl, azulenyl, or their substituted analogs), when bridged to each other, will be lower-alky 1-substituted (Cι-C6) in the 2 position (with or without a similar 4-position substituent in the fused ring systems) and can additionally comprise alkyl, cycloalkyl, aryl, alkylaryl, or arylalkyl substituents, the latter as linear, branched, or cyclic structures including multi-ring structures, for example, those of U.S. patents 5,278,264 and 5,304,614. Such substituents should each have essentially hydrocarbyl characteristics and will typically contain up to 30 carbon atoms, but may be heteroatom-containing with 1-5 non-hydrogen/carbon atoms, e.g., N, S, O, P, Ge, B and Si.
Further, metallocene compounds suitable for polyethylene or ethylene- containing copolymers (where copolymer means comprising at least two different monomers) are essentially any of those known in the art, see again WO-A-92/00333 and U.S. patents 5,001,205, 5,198,401, 5,324,800, 5,304,614 and 5,308,816, for spe- cific listings. Selecting and making isotactic or syndiotactic polypropylene-producing metallocenes, see for example Journal of Organometallic Chemistry, 369, 359-370 (1989). Typically those catalysts are stereorigid asymmetric, chiral or bridged chiral metallocenes. See, for example, U.S. patent 4,892,851, U.S. patent 5,017,714, U.S. patent 5,296,434, U.S. patent 5,278,264, WO-A-(PCT/US92/10066) WO-A- 93/19103, EP-A2-0 577 581, EP-A1-0 578 838, and academic literature "The Influence of Aromatic Substituents on the Polymerization Behavior of Bridged Zircono- cene Catalysts", Spaleck, W., et al, Organometallics 1994, 13, 954-963, and "ansa- Zirconocene Polymerization Catalysts with Annelated Ring Ligands-Effects on Catalytic Activity and Polymer Chain Lengths", Brinzinger, EL, et al, Organometallics 1994, 13, 964-970. Though many of the references above are directed to alumoxane activated catalyst systems, analogous metallocenes will be useful with invention cocatalyst activators for active coordination catalyst systems, when the halogen amide, or alkoxy-containing metal ligands (where occurring) are replaced with abstractable ligands as discussed above. See additional description in G. G. Hlatky, "Metallocene catalysts for olefin polymerization Annual review of 1996", Coordination Chemistry
Reviews, 181, 243-296 (Elsevier Science, 1999).
Some representative metallocene compounds have the formula : In this formula, Mc is a Group— 3-6 metal. LA is a substituted or unsubstituted cy- clopentadienyl ligand connected to Mc. LB is a member of the ligands class defined for LA of LB is heteroatom ligand, designated J, which is connected to Mc. The LA and L ligands may bridge or connect each other through one or more Group— 13— 16 element-containing linking groups. L ; is an optional neutral, non-oxidizing ligand connected to Mc (i=0 to 3). Finally, D and E are independent labile ligands connected to Mc. D & E are optionally bridged to each other or L or LB. This connection can be broken by the activator and monomer can insert into this bond for polymerization. Also, the use of hetero-atom containing rings or fused rings, where a non-carbon Group 13, 14, 15 or 16 atom replaces one of the ring carbons is considered for this specification to be within the terms "cyclopentadienyl", "indenyl", and "fluorenyl". See, for example, the background and teachings of WO 98/37106, having common priority with U.S. Ser. No. 08/999,214, filed 12/29/97, and WO 98/41530, having common priority with U.S. Ser. No. 09/042,378, filed 3/13/98.
Substituted cyclopentadienyl structures means that one or more hydrogen atoms is replaced with hydrocarbyl, hydrocarbylsilyl, or similar heteroatom-containing structures. The hydrocarbyl structures specifically include C1-C30 linear, branched, cyclic alkyl and cycloaromatic fused and pendent rings. These rings may also be substituted with similar structures.
Non-limiting representative metallocene compounds include mono- cyclopentadienyl compounds such as pentamethylcyclopentadienyltitanium isopro- poxide, pentamethylcyclopentadienyltribenzyl titanium, dimethylsilyltetramethyl- cyclopentadienyl-tert-butylamido titanium dichloride, pentamethylcyclopentadienyl titanium trimethyl, dimethylsilyltetramethylcyclopentadienyl-tert-butylamido zircco- nium dimethyl, dimethylsilyltetramethylcyclopentadienyl-dodecylamido hafnium di- hydride, dimethylsilyltetramethylcyclopentadienyl-dodecylamido hafnium dimethyl, unbridged biscyclopentadienyl compounds such as bis( 1,3 -butyl, methylcyclopentadi- enyl) zircconium dimethyl, pentamethylcyclopentadienyl-cyclopentadienyl zirconium dimethyl, (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl; bridged bis-cyclopentadienyl compounds such as dimethylsilyl- bis(tetrahydroindenyl) zirconium dichloride and silacyclobu- tyl(tetramethylcyclopentadienyl)(n-propyl-cyclopentadienyl) zirconium dimethyl; bridged bisindenyl compounds such as dimethylsilylbisindenyl zirconium dichloride, dimethylsilylbisindenyl hafnium dimethyl, dimethylsilylbis(2-methylbenzindenyl) zirconium dichloride, dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; and fluorenyl ligand-containing compounds, e.g. diphenyl- methyl(fluorenyl)(cyclopentadienyl)zirconium dimethyl; and the additional ono- and biscyclopentadienyl compounds such as those listed and described in U.S. patents 5,017,714, 5,324,800, WO 92/00333 and EP-A-0 591 756. Particular advantage in solution polymerization can be achieved by the use of aliphatic solvent-soluble pre- cursor compounds, e.g., bis αrø-triethylsilyl-phenyl) methylene (2, 7-(di-tert-butyl) fluorenyl)(cyclopentadienyl) hafnium dimethyl, however, the solubilizing effect of the aliphatic solvent-soluble anion compounds of the invention will tend to offset poor solubility for typical organometallic compound cations useful in olefin polymerization. See copending applications U.S. serial numbers 09/426,099, filed 22 October 1999, and 09/194,595 filed October 1999 for background as to soluble catalysts and specific metallocene and precursor cocatalyst cations useful with the current invention.
Representative traditional Ziegler-Natta transition metal compounds include tetrabenzyl zirconium, tetra bis(trimethylsiylmethyl) zirconium, oxo- tris(trimethlsilylmethyl) vanadium, tetrabenzyl hafnium, tetrabenzyl titanium, bis(hexamethyl disilazido)dimethyl titanium, tris(trimethyl silyl methyl) niobium dichloride, tris(trimethylsilylmethyl) tantalum dichloride. The important features of such compositions for coordination polymerization are the abstractable ligand and that ligand into which the ethylene (olefinic) group can be inserted. These features enable ligand abstraction from the transition metal compound and the concomitant formation of the invention catalysts.
Additional organometallic transition metal compounds suitable as olefin polymerization catalysts in accordance with the invention will be any of those Group 3-10 that can be converted by ligand abstraction or bond scission into a catalytically active cation and that can be stabilized or charge balanced in that active state by a noncoordinating or weakly coordinating anion. The non-coordinating anion should be sufficiently labile to be displaced by an olefinically unsaturated monomer such as ethylene.
Exemplary compounds include those described in the patent literature. In- ternational patent publications WO 96/23010, WO 97/48735 and Gibson, et. al.,
Chem. Comm., pp. 849-850 (1998), disclose diimine-based ligands for Group-8-10 metal compounds shown to be suitable for ionic activation and olefin polymerization. See also WO 97/48735. Polymerization catalyst systems from Group-5- 10 metals wherein the active transition metal center is in a high oxidation state and stabilized by low coordination number polyanionic ancillary ligand systems are described in U.S. patent 5,502,124 and patent 5,504,049. See also the Group-5 organometallic catalyst compounds of U.S. patent 5,851,945 and the tridentate-ligand-containing Group-5-10 organometallic catalyst compounds of copending U.S. application serial number 09/302243. (Filed 29 April 1999, allowed 23 April 2001). Group-11 catalyst precursor compounds, activable (capable of activation) with ionizing cocatalysts, useful for olefins and vinyl-group-containing polar monomers are described and exemplified in WO 99/30822 copending U.S. Patent Application Serial Number 08/991,160. (Filed
16 December 1997; allowed 14 March 2001).
U.S. patent 5,318,935 describes bridged and unbridged, bisamido catalyst compounds of Group-4 metals capable of α-olefins polymerization. Bridged bis(arylamido) Group-4 compounds for olefin polymerization are described by D. H. McConville. et al., in Organometallics 1995, 14, 5478-5480. Synthetic methods and compound characterization are presented. Further work appearing in D. H. McConville, et al, Macromolecules 1996, 29, 5241-5243, describes bridged bis(arylamido) Group-4 compounds that are polymerization catalysts for 1-hexene. Additional invention-suitable transition metal compounds include those described in WO 96/40805. Cationic Group-3- or Lanthanide-metal olefin polymerization complexes are disclosed in copending U.S. application Ser. No. 09/408050. (Filed 29 September 1999). A monoanionic bidentate ligand and two monoanionic ligands stabilize those catalyst precursors, which are activable with invention ionic cocatalysts.
The literature contains many additional descriptions of suitable catalyst- precursor compounds. Compounds that contain abstractable ligands or that can be alkylated to contain abstractable ligands are suitable for the practice of this invention. See, for instance, V. C. Gibson, et al; "The Search for New-Generation Olefin Polymerization Catalysts: Life Beyond Metallocenes", Angew. Chem. Int. Ed, 38, 428-447 (1999). When using the above catalysts, the catalyst system will generally employ one or more scavenging agents to remove polar impurities from the reaction environment and to increase catalyst activity. Any polymerization reaction components, particu- larly solvents, monomers, and catalyst feedstreams, can inadvertently introduce impurities and adversely affect catalyst activity and stability. Impurities decrease or even eliminate catalytic activity, particularly with ionizing-anion-activated catalyst systems. Polar impurities (or catalyst poisons) include water, oxygen, metal impurities, etc. Preferably, these impurities are removed from or reduced in the reaction components before the components enter the reaction vessel. Impurities can be removed by chemically treating the components or by impurity-separation steps. Such treatment or separation can occur during or after component synthesis. In any case, the polymerization process will normally employ minor scavenging agent amounts. Typically, these scavengers will be organometallic such as the Group-13 compounds of U.S.
Patents 5,153,157; 5,241,025; WO-A-91/09882; WO-A-94/03506; WO-A-93/14132; and WO 95/07941. Exemplary compounds include triethyl aluminum, triethyl bo- rane, triisobutyl aluminum, methylalumoxane, and isobutyl alumoxane. In some embodiments, compounds having bulky or C6-C20 linear hydrocarbyl substituents con- nected to the metal or metalloid center are used because they coordinate to the active catalyst more weakly. Examples include triethylaluminum; bulky compounds, such as triisobutylaluminum; triisoprenylaluminum, and long-chain, linear-alkyl- substituted aluminum compounds, such as tri-n-hexylaluminum, tri-n-octylaluminum, or tri-n-dodecylaluminum. When alumoxane is used as the activator, any excess over that needed to activate the catalyst can act as a scavenger and additional organometallic scavengers may be unnecessary. Alumoxanes also may be used as scavengers with other activators, e.g., methylalumoxane and triisobutyl-alumoxane with boron-based activators. The scavenger amount is limited to that amount effective to enhance activity (and with that amount necessary for activation when used in a dual role) since excess amounts can poison the catalyst
Invention catalyst systems can polymerize unsaturated molecules that are conventionally recognized as metallocene polymerizable. Typical conditions include solution, slurry, gas-phase, and high-pressure polymerization. The catalysts may be supported, such as on inorganic oxide or polymeric supports and as such will be use- ful in those operating modes employing fixed-bed, moving-bed, fluid-bed, slurry, or solution processes conducted in single, series, or parallel reactors. Invention cocata- lysts can also function in catalyst pre-polymerization. WO 98/55518 describes an invention support method for gas-phase or slurry polymerization.
Alternative embodiments of invention olefin polymerization methods employ the catalyst system in liquid phase (solution, slurry, suspension, bulk phase, or combi- nations thereof), in high-pressure liquid or supercritical fluid phase, or in gas phase.
These processes may also be employed in singular, parallel, or series reactors. The liquid processes comprise contacting olefin molecules with the catalyst system in a suitable diluent or solvent and allowing those molecules to react long enough to produce the invention polymers. The term polymer encompasses both homo- and co- polymers. Both aliphatic and aromatic hydrocarbyl solvents are suitable, e.g., hexane.
In bulk and slurry processes, the supported catalysts typically contact a liquid monomer slurry. Gas-phase processes use a supported catalyst and follow any manner suitable for ethylene polymerization. Illustrative examples may be found in U.S. Patents 4,543,399; 4,588,790; 5,028,670; 5,382,638; 5352,749; 5,408,017; 5,436,304; 5,453,471; and 5,463,999; 5,767,208; and WO 95/07942.
In some embodiments, the minimum polymerization reaction temperature is 40°C. In others, the minimum reaction temperature is 60°C. In some embodiments, the temperature can go as high as 250°C. In others, the temperature does not exceed 220°C. In some embodiments, the minimum reaction pressure is 1 mm Hg; in others, 0.1 bar, and in yet others, 1.0 bar. In some embodiments, the maximum pressure is less than or equal to 2500 bar, in others, 1600 bar or lower, and in yet others, 500 bar or less.
For homogenous solution polymerization, good results can be obtained when the quantity and type of solvent used to introduce the catalyst is controlled as well as the manner of introduction. Generally, skilled artisans believe it preferable to achieve full solution and avoid slurried systems, and hence fairly high concentrations of the catalyst, at low temperatures and to use low solvent amounts. The difficulty of meeting these objectives varies with the solubility of the non-coordinating anion and transition metal components. Some of the more active catalysts or those likely to give a higher molecular weight at a given temperature, may have reduced solubility or may be modified for increased solubility. Embodiments of the invention are suitable for solution polymerization with bridged fluorenyl metallocene hafnium compounds coupled with naphthyi-group- containing, non-coordinating anions at polymerization temperatures > 110 °C, for elastomeric olefin copolymers, and, between 160 °C and 250 °C for plastomeric eth- ylene copolymers.
Linear polyethylene, including high and ultra-high molecular weight poly- ethylenes, including both homo- and copolymers with other alpha-olefin monomers, alpha-olefmic or non-conjugated diolefms, for example, C3-C20 olefins, diolefϊns or cyclic olefins, are produced by adding ethylene, and optionally one or more of the other monomers, to a reaction vessel under low pressure (typically < 50 bar), at a typical temperature of 40-250 °C with the invention catalyst that has been slurried with a solvent, such as hexane or toluene. Cooling typically removes polymerization heat. Gas-phase polymerization can be conducted, for example, in a continuous fluid bed gas-phase reactor operated at 2000-3000 kPa and 60-160 °C, using hydrogen as a reaction modifier (100-200 PPM), C4-C8 comonomer feedstreams (0.5-1.2 mol%), and C2 feedstreams (25-35 mol%).
Ethylene-α-olefin (including ethylene-cyclic olefin and ethylene-α-olefin- diolefin) elastomers of high molecular weight and low crystallinity can be prepared using invention catalysts. This preparation uses traditional solution polymerization processes or processes that introduce ethylene into a slurry. The slurry is made up of
-α-olefin or cyclic olefin, by themselves or mixed together. The slurry also can contain other (un)polymerizable components that act as polymerization diluents and that suspend the catalyst (system). Typical ethylene pressures will be between 10 and 1000 psig (69-6895 kPa), and the polymerization diluent temperature typically re- mains between 40 and 160 °C. The process can be carried out in one or more stirred tank reactors, operated in series or parallel.
Other olefinically unsaturated monomers can also be polymerized using invention catalysts, for example, styrene, alkyl-substituted styrenes, isobutylene, and other geminally disubstituted olefins, ethylidene norbornene, norbornadiene, dicyclo- pentadiene, and other olefinically-unsaturated monomers, including other cyclic olefins, such as cyclopentene, norbornene, alkyl-substituted norbornenes, -end vinyl- group-containing polar monomers capable of coordinating polymerization. See, for example, U.S. Patents 5,635,573, 5,763,556, and WO 99/30822. Additionally, alpha- olefinic macromonomers may also be copolymerized yielding branch-containing olefin polymers. Furthermore, oligomerization, dimerization, hydrogenation, ole- fm/carbon monoxide copolymerization, hydroformulation, hydrosilation, hydroami- nation and related catalytic reactions employing organometallic cationic complexes can be accomplished using invention cocatalyst complexes with organometallic compounds suitably selected as known in the art.
Invention catalyst compositions can be used as described above individually for coordination polymerization or can be mixed with other olefin polymerization catalyst compounds to prepare polymer blends. Monomer and catalyst selection allows blends preparation under conditions analogous to those using individual catalyst compositions. Polymers having increased MWD for improved processing and other traditional benefits available from mixed-catalyst-system polymers can thus be achieved.
Blended polymers can be formed ex situ using mechanical blending or in situ using mixed catalyst systems. In situ blending seems to provide a more homogeneous product and allows one-step blend production. In situ blending involves combining more than one catalyst (i.e. a mixed catalyst system) in a reactor to simultane- ously prepare multiple polymer products. This method requires additional catalyst synthesis. Mixed catalyst systems require catalyst actives to be matched. Furthermore, the polymers the catalysts produce at specific conditions and the catalyst response to changed polymerization conditions must be matched, as well.
Some embodiments take the form of a catalyst composition for olefin po- lymerization. This composition is the reaction product of an organometallic catalyst having at least one stabilizing ligand and a labile ligand into which olefins can insert and a cocatalyst comprising a cation [Ct] and an anion [A]". The cocatalyst anion comprises a Group-13 element connected to at least one independently selected fluoroaryl ligand that is para-substituted with a siloxy group. The siloxy group are repre- sented by the symbols -SiOR3, and each R is independently a -C30 hydrocarbyl or hydrocarbylsilyl substituent. In some embodiments, the cocatalyst has the following formula: [CtJ+ [M(ArF)n((ArF)OSiR3)4-n]". In this formula [Ct]+ is an activating cation, M is boron or aluminum, ArF are each independently fluoroaryl groups with at least one fluorine substitution, and R are each independently -C20 hydrocarbyl or hydrocarbylsilyl substituent. R attaches to the Si atom through a secondary or tertiary carbon atom. In some embodiments;, at least one fluorinated aryl group is perfluorinated. In other embodiments, each fluorinated aryl group is perfluorinated.
In some embodiments, the composition has [Ct]+ equal to one of anilinium ca- tions, ammonium cations, trityl carbenium cations, Group- 11 metal cations, silylium cations, hydrated Group-1 or -2 salt cations, and derivatives of anilinium, ammonium, trityl carbenium, and silylium cations containing -C20 hydrocarbyl, hydrocarbylsilyl, or hydrocarbylamine substitutions for one or more hydrogen atoms on the cations.
In some embodiments, the organometallic catalyst portion is a Group-3- 10 metal compound activable to a monovalent cation for olefin polymerization. In others the organometallic catalyst portion is a Group-3 -6 metal compound activable to a monovalent cation for olefin polymerization, which has the following formula: L L LCi McDE. LA is a (un)substituted cyclopentadienyl or heterocyclopentadienyl ligand connected to Mc, LB is a member of LA ligands, or is J, a heteroatom ligand connected to Mc, optionally, LA and LB are linked through a Group-13-16-element-containing group, LCj is an optional neutral, non-oxidizing ligand connected to Mc, i equals 0-3, Mc is a Group-3 -6 metal; and D and E are independently labile ligands, optionally bridged to each other or to LA or LB, with a metal-carbon connection to Mc that can be broken by invention cocatalyst and into which a polymerizable monomer or mac- romer can insert for polymerization. In some embodiments, Mc is titanium and LB is a heteroatom ligand, J, connected to Mc.
In other embodiments, Mc is zirconium or hafnium and LB is independently a substituted or unsubstituted cyclopentadienyl or heterocyclopentadienyl ligand connected to Mc. Other invention embodiments, the invention take the form of a process for preparing polyolefins from one or more olefinic monomers comprising combining the olefins under polymerization conditions with a catalyst system, as described above.
In some of those embodiments or others the catalyst system contains an activable Group-3- 10 organometallic catalyst for olefin polymerization.
Some invention process embodiments include polymerization conditions that comprise solution, supercritical pressure, bulk, slurry, or gas phase processes conducted at reaction temperatures from 30-300 °C and pressures from 0-2000 bar. Some embodiments use adiabatic solution techniques at reaction temperatures from
40-250°C. Invention embodiments can be unsupported or the activated organometallic complex is carried on or affixed to a particulate support material. Moreover, the complex can be affixed to the support before, during, or after activation.
Some invention embodiments use olefinic monomers selected from ethylene, C3-C20 olefins, C5-C2o diolefins, C -C2o vinyl aromatic monomers, C4-C20 gemi- nally disubstituted olefins, or C5-C20 cyclic olefins.
Other invention embodiments take the form of polymers prepared with the catalyst systems described above.
Some exemplary catalyst systems are disclosed below. The format the list takes is cocatalyst precursor/catalyst precursor.
[isopropyl-ammonium]+[(3-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenyl)borate] isopropyl
(cyclopentadienyl) (fluorenyl) hafnium dimethyl; [isopropyl-ammonium] [(4-
{(triethylsilylmethyl)isopropylnonylsiloxy}perfluorophenyl) (pentafluoroanthracenyl)
(perfluoroanthracenyl) (perfluorobiphenyl)aluminate] dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [isopropyl-ammonium]+[(5-{hexylisopropyloctylsiloxy}perfluoroinden-1-yl)bis(2,3,6- trifluorophenyl) (perfluoropyrenylborate] dim thylsilyl bisindenyl hafnium dimethyl;
[isopropyl-ammonium]+[(5-{isopropylcyclohexyl (3-ethylnonyl)siloxy}perfluoronapth-1- yl)bis(tetrafluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [isopropyl-ammonium]+[(6-{(2,2-dimethyloctyl)isopropyl(2,2-dimethyloctyl)siloxy}- perfluoroanthracen-2-yl) (2',3',5'-trifluorobiphenyl) (2,3,6-trifluorophenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [isopropyl-ammonium]+[(6-{isopropyl(triethylsilylethyl) (triethylsilylhexyl)siloxy}- perfluorofluoren-2-yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [methylphenylammonium]+[(5-{(triethylsilylmethyl)isopropylbenzylsiloxy}perfluoroinden-1-yl) (perfluorofluorenyl) (2,3,6-trifluorophenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride;
[methylphenylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluoronaphthyl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7- di-t-butyl-fluorenyl) hafnium dimethyl; [methylphenylammonium]+[(7-{( triethylsilylpropyl)benzylisopropylsiloxy}perfluoronapth-2-yl) (2,3,6-trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene
(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [methylphenylammonium]+[(7-{( triethylsilylpropyl)benzylisopropylsiloxy}perfluoronapth-2-yl) (2,3,6-trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4- yl) (pentalfluoropyrenyl) (4,5,7-trifluoronaphthyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [methylphenyl-phosphonium]+ [(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (pentalfluoropyrenyl) (4,5,7-trifluoronaphthyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(4'-{tri- (isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)
(tetrafluorofluorenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl) (perfluorobiphenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [methylphenyl-phosphonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl)
(4,5,7-trifluoronaphthyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [methylphenyl-phosphonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1- amino) titanium dimethyl; [methylphenyl-phosphonium]+[(6-{(tri-n- propylsilylhexyl)isopropyloctylsiloxy}perfluoronapth-2-yl) (2',3',5'-trifluorobiphenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)borate]7 (pentamethylcyclopentadienyl)
(cyclopentadienyl)zirconium dimethyl; [methylphenyl-phosphonium]+[(6-{tri-(isopropyl)siloxy}- perfluorofluoren-l-yl)bis(perfluoroanthracenyl) (perfluorophenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [methylphenyl-phosphonium]+[(7-{(trimethylsilylethyl) (t-butyl) (triethylsilylethyl)siloxy}- perfluorofluoren-2-yl) (2,3,4-trifluorophenyl) (4,5,6-trifluoronaphthyl)
(perfluorobiphenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(7-{di-(isopropyl) (2,2-dimethyloctyl)siloxy}perfluorofluoren-1-yl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl) (2',3',5'-trifluorobiphenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(7-{ethyl(methyldiethylsilyloctyl)isopropylsiloxy}- perfluoroanthracen-1-yl)bis(perfluorophenyl) (tetrafluorofluorenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [methylphenyl-phosphonium]+[(7- {hexylisopropyl (3-ethylnonyl)siloxy}perfluoropyren-2-yl) (2,3,6-trifluorophenyl) (4,5,6- trifluoronaphthyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t- butylamido) zirconium dimethyl; [methylphenyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}- perfluoroanthracen-1-yl)bis(4,5,6-trifluoronaphthyl) (2',3',4'-trifluorobiphenylborate]7 methylene bis(fluorenyl) hafnium dimethyl; [N,N-di(dodecyl)-anilinium]+[(3-{tri- (isopropyl)siloxy}fluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [N,N-di(dodecyl)-anilinium]+[(3-{tri-(isopropyl)siloxy}fluorophenyl)
(5,6,7,8-tetrafluoronaphthyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-di(dodecyl)-anilinium]+[(4- {di-((methyldiethylsilyloctyl)) (tri-(isopropyl)silyloctyl)siloxy}perfluorophenyl) (pentafluoroanthracenyl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [N,N- di(dodecyl)-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl) (2,3,4-trifluorophenyl) (perfluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [N,N-di(dodecyl)-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl) (2,3,4- trifluorophenyl) (perfluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-di(dodecyl)-anilinium]+[(4- {tri-(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (2,3,5-trifluorophenyl) (perfluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [N,N- di(dodecyl)-anilinium]+[(4-{tri-(isopropyl)siIoxy}perfluorophenyl) (perfluorophenyl) (4,5,6- trifluoronaphthyl) (perfluorofluorenyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-di(dodecyl)-anilinium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (4, 5,6-trifluoronaphthylaluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [N,N-dimethyl-anilinium]+[(2'- {(triethylsilylhexyl)benzylisopropylsiloxy}perfluorobiphen-4-yl) (perfluorobiphenyl)
(perfluorofluorenyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(2'-{di- ((methyldiethylsilyloctyl))cyclohexylsiloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 dimethylsily (bisindenyl) zirconium dichloride; [N,N- dimethyl-anilinium]+[(2'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorophenyl)
(perfluoroanthracenyl) (perfluorofluorenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(2'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl)bis(perfluoropyrenyl) (perfluorophenylborate]7 dimethylsilyl bis(2-propyl- indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3'-{(t- butyl)isopropyl(triethylsilylhexyl)siloxy}perfluorobiphen-4-yl)bis(perfluorophenyl)
(perfluorobiphenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3-{(triethylsilylethyl)isopropyl(tri-n- propylsilylhexyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6- trifluoronaphthyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3'-{(triethylsilylhexyl) (3-ethylnonyl)isopropylsiloxy}- perfluorobiphen-4-yl) (perfluoronaphthyl) (4,5,7-trifluoronaphthyl) (2',3',5'- trifluorobiphenyl)borate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3'-{(triethylsilylhexyl) (3- ethylnonyl)isopropylsiloxy}perfluorobiphen-4-yl) (perfluoronaphthyl) (4,5,7-trifluoronaphthyl) (2',3',5'-trifluorobiphenyl)borate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3- {benzylisopropylnonylsiloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenylaluminate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(3-{di-((t-butyl)) (3-ethylnonyl)siloxy}- perfluorophenyl)bis(perfluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(3-{di-(isopropyl)n-butylsiloxy}perfluorophenyl) (4,5,6,7- tetrafluoronaphthyl) (perfluoropyrenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorobiphenyl)borate]7 bis(1,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3-{tri- (isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (perfluorobiphenyl) (2',3',4'- trifluorobiphenyl)aluminate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(3-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorobiphenyl) (4,5,7-trifluoronaphthylborate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-aniliniumJ+[(4-{ (3-ethylnonyl)isopropyl(tri-n-propylsilylhexyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [N,N-dimethyl-anilinium]+[(4'-{( triethylsilylprόpyl) (triethylsilylethyl)cyclohexylsiloxy}- perfluorobiphen-3-yl) (2',3',5'-trifluorobiphenyl) (perfluorobiphenyl)
(tetrafluorofluorenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{( triethylsilylpropyl)benzylisopropylsiloxy}perfluorophenyl) (perfluoronaphthyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{(2,2-dimethyloctyl) (methyldiethylsilyloctyl)isopropylsiIoxy}perfluorobiphen-3-yl) (perfluorophenyl) (2',3',4'- trifluorobiphenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [N,N-dimethyl-anilinium]+[(4-{(methyldiethylsilyloctyl) (t- butyl)isopropylsiloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoronaphthylborate]7 (4-n- propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{(methyldiethylsilyloctyl) (t-butyl)isopropylsiloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluoronaphthylborate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(4-{(methyldiethy4silyloctyl) (t-butyl)isopropy!siloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoronaphthylborate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{(methyldiethylsilyloctyl) (t-butyl)isopropylsiloxy}- perfluorophenyl)bis(perfluorophenyl) (perftuoronaphthylborate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4'-
{(methyldiethylsilyloctyl)nonylisopropylsiloxy}perfluorobiphen-3-yl) (4,5,6,7- tetrafluoronaphthyl) (2,3,5-trifluorophenyl) (pentalfluoropyrenyl)borate]7 (4-n-butylphenyl) (4- t-butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [N,N- dimethyl-anilinium]+[(4'-{(tri-(isopropyl)silyloctyl) (tri-n-propylsilylhexyl)isopropylsiloxy}- fluorobiphen-4-yl)bis(perfluorophenyl) (2,3,6-trifluorophenylborate]7 diphenylmethylene (2,7- di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{(tri- (isopropyl)silyloctyl)isopropyl (3-ethylnonyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoropyrenyl)borate]7 (4-alkylphenyl) (4-t-butylphenyi)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4- {(triethylsilylethyl)isopropylbenzylsiloxy}perfluorophenyl) (4,5,6-trifluoronaphthyl) (2,3,5- trifluorophenyl) (perfluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{(triethylsilylhexyl)isopropylcyclohexylsiloxy}- perfluorophenyl)bis(2,3,5-trifluorophenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(2- methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4- {(trimethylsilylethy!) (2,2-dimethyloctyl)isopropylsiloxy}perfluorophenyl) (perfluoronaphthyl)
(perfluorophenyl) (perfluoroanthracenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium +[(4'-{(trimethylsilylethyl)isopropyl(2,2- dimethyloctyl)siloxy}perfluorobiphen-3-yl)bis(perfluorophenyl) (5,6,7,8- tetrafluoronaphthylborate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{benzylisopropylnonylsiloxy}perfluorophenyl)bis(perfluorobiphenyl)
(2,3,4-trifluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{di-((t-butyl)) (3-ethylnonyl)siloxy}- fluorophenyl) (4,5,6-trifluoronaphthyl) (2,3,6-trifluorophenyl) (perfluorobiphenyl)borate]7 b\s(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{di- (isopropyl) ( triethylsilylpropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (4,5,6,7- tetrafluoronaphthylborate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{isopropyl (3-ethylnonyl) (tri-n-propylsilylhexyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluoropyrenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [N,N- dimethyl-anilinium]+[(4-{isopropyl(triethylsilylhexyl) (triethylsilylethyl)siloxy}perfluorophenyl) (perfluorophenyl) (2',3, 15'-trifluorobiphenyl) (perfluoropyrenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{isopropyl(trimethylsilylethyl)isopropylsiloxy}perfluorophenyl) (5,6,7,8- tetrafluoronaphthyl) (perfluorophenyl) (2',3',4'-trifluorobiphenyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4- {isopropyl(trimethylsilylethyl)isopropylsiloxy}perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl) (2',3',4'-trifluorobiphenyl)borate]7 bis(1,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl)
(perfluoronaphthyl) (perfluorophenyl) (perfluoropyrenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [N,N-dimethyl-anilinium]+[(4'- {tri-(isopropyi)siloxy}perfluorobiphen-3-yl)bis(perfluorophenyl) (5,6,7,8- tetrafluoronaphthyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)
(4,5,7-trifluoronaphthyl) (2',3',4'-trifluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl) (4,5,7-trifluoronaphthyl) (2',3',4'-trifluorobiphenyl) (perfluorofluorenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4,-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorofluorenyl)
(perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4- yl)bis(perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [N,N- dimethyl-anilinium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorobiphenyl)
(5,6,7,8-tetrafluoronaphthyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [N,N- dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2',3',4'-trifluorobiphenyl) (2,3,5- trifluorophenyl) (2,3,6-trifluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4- {tri-(isopropyl)siloxy}perfluorophenyl) (2',3',5'-trifluorobiphenyl) (perfluoropyrenyl)
(perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri-(isopropyl)siJoxy}- perfluorophenyl) (2,3,6-trifluorophenyl) (2,3,5-trifluorophenyl) (perfluorobiphenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri- (isopropyl)siloxy}perfluorophenyl) (2,3,6-trifluorophenyl) (2,3,5-trifluorophenyl) (perfluorobiphenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [N,N- dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorofluorenyl) (2,3,5- trifluorophenyl) (perfluoropyrenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [N,N- dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (perfluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-
{tri-(isopropyl)si!oxy}perfluorophenyl) (perfluorophenyl) (perfluorobiphenyl) (4,5,6- trifluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl) (perfluorophenyl) (perfluorofluorenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl;
[N,N-dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [N,N- dimethyl-anilinium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (tetrafluorofluorenylaluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(4-{tri-
(isopropyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (tetrafluorofluorenylaluminate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [N,N- dimethyl-anilinium]+[(5-{ (3-ethylnonyl)isopropyl(tri-n-propylsilylhexyl)siloxy}perfluoronapth-2- yl) (2',3',4'-trifluorobiphenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [N,N-dimethyl-anilinium]+[(5-{(2,2-dimethyloctyl)
(methyldiethylsilyloctyl)isopropylsiloxy}fluoroinden-2-yl) (perfluoronaphthyl) (perfluorofluorenyl) (perfluoropyrenyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(2,2-dimethyloctyl) (methyldiethylsilyloctyl)isopropylsiloxy}- fluoroinden-2-yl) (perfluoronaphthyl) (perfluorofluorenyl) (perfluoropyrenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(2,2- dimethyloctyl) (triethylsilylethyl)isopropylsiloxy}fluoronapth-3-yl) (perfluoropyrenyl)
(perfluorobiphenyl) (perfluorofluorenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7- dimethylfluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(2,2-dimethyloctyl) (triethyIsilylethyl)isopropylsiloxy}fluoronapth-3-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(2,2- dimethyloctyl)cyclohexyl( triethylsilylpropyl)siloxy}perfluoroinden-1-yl)bis(perfluorophenyl) (perfluorofluorenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(2,2- dimethyloctyl)cyclohexyl( triethylsilylpropyl)siloxy}perfluoroinden-1-yl)bis(perfluorophenyl) (perfluorofluorenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(methyldiethylsilyloctyl)isopropyl(tri- (isopropyl)silyloctyl)siloxy}perfluoronapth-2-yl)bis(perfluorophenyl) (perfluorofluorenyl)borate]- / dimethylsilyl bis(indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{(trimethylsilylethyl) ( triethylsilylpropyl)isopropylsiloxy}perfluoroinden-2-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluoroanthracenyl) (pentafluoroanthracenyl)borate]7 bis(trimethylsilyl) titanium dimethyl;
[N,N-dimethyl-anilinium]+[(5-(cyclohexyl( triethylsilylpropyl)isopropylsiloxy}perfluoroinden-1- yl)bis(4,5,6-trifluoronaphthyl) (tetrafluorofluorenyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{di-(isopropyl)hexylsiloxy}perfluoroinden-2-yl) (perfluorophenyl) (perfluoropyrenyl) (tetrafluorofluorenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [N,N-dimethyl-anilinium]+[(5-{isopropyl(methyldiethylsilyloctyl)cyclohexylsiloxy}- perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [N,N- dimethyl-anilinium]+[(5-{isopropylcyclohexyl (3-ethylnonyl)siloxy}perfluoronapth-2- yl)bis(perfluorobiphenyl) (pentalfluoropyrenylborate]7 di(4-n-butylphenyl)methylene (2,7- dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [N,N-dimethyl-anilinium]+[(5-
{isopropylnonyl(tri-n-propylsilylhexyl)siloxy}perfluoroinden-1-yl) (perfluoropyrenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}- fluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (pentalfluoropyrenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}fluoronapth-3-yl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-1-yl)
(2,3,6-trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri- (isopropyl)siloxy}perfluoroinden-1-yl)bis(perfluorobiphenyl) (2',3',5'-trifluorobiphenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [N,N-dimethyl-anilinium]+[(5-{tri- (isopropyl)siIoxy}perfluoroinden-2-yl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (5,6,7,8- tetrafluoronaphthyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (2',3',4'-trifluorobiphenyl) (perfluorof!uorenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}- perfluoronaphth-3-yl) (5,6,7,8-tetrafluoronaphthyl) (2,3,5-trifluorophenyl)
(perfluorophenyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [N,N- dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (2,3,5- trifluorophenyl) (2',3,,5'-trifluorobiphenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (2',3',5'-trifluorobiphenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-1-yl) (perfluorobiphenyl) (perfluoroanthracenyl) (perfluorophenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [N,N- dimethyl-anilinium] [(5-{tri-(isopropyl)siloxy}perfluoronapth-1-y|) (perfluorophenyl) (perfluoropyrenyl) (4,5,7-trifluoronaphthyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1- yl)bis(perfluorobiphenyl) (tetrafluorofluorenylborate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl- indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth- 2-yl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (pentalfluoropyrenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-
(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (pentalfluoropyrenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyffluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siIoxy}perfluoronapth-2-yl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (pentalfluoropyrenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-2-yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)a!uminate]7 (4- n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [N,N- dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (2,3,5- trifluorophenyl) (pentafluoroanthracenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (tetrafluorofluorenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (tetrafluorofluorenyl) (perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{( triethylsilylρropyl)benzylisopropylsiloxy}fluoroanthracen-1- yl)bis(perfluoroanthracenyl) (perfluoropyrenylborate]7 bis(4- triethyisilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{( triethylsilylpropyl)isopropylnonylsiloxy}perfluoroanthracen-1-yl)
(perfluorophenyl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{(2,2-dimethyloctyl)cyclohexyl( triethylsilylpropyl)siloxy}- perfluoroanthracen-1-yl) (perfluoroanthracenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]- / dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [N,N-dimethyl-anilinium]+[(6-
{(methyldiethylsilyloctyl)hexyl (3-ethylnonyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (pentafluoroanthracenyl) (perfluorobiphenyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{(tri- (isopropyl)silyloctyl)isopropyl(triethylsilylmethyl)siloxy}perfluorofluoren-2- yl)bis(perfluorophenyl) (perfluorobiphenylaluminate]7 dimethylsily (bisindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(6- {(trimethylsilylethyl)isopropyl(trimethylsilylethyl)siloxy}perfluoroanthracen-1- yl)bis(perfluorophenyl) (pentalfluoropyrenylborate]7 (4-alkylphenyl) (4-t- butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{(trimethylsilylethyl)isopropyl(trimethylsilylethyl)siloxy}- perfluoroanthracen- -yl)bis(perfluorophenyl) (pentalfluoropyrenylborate]7 dimethylsilyl bis(2- methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-
{(trimethylsilylethyl)isopropyl(trimethylsilylethyl)siloxy}perfluoroanthracen-1- yl)bis(perfluorophenyl) (pentalfluoropyrenylborate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [N,N- dimethyl-anilinium]+[(6-{benzylisopropyloctylsiloxy}perfluoronapth-2-yl) (2,3,6-trifluorophenyl) (2,3,5-trifluorophenyl) (perfluoroanthracenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [N,N- dimethyl-anilinium]+[(6-{benzylnonylisopropylsiloxy}perfluoronapth-1-yl)bis(perfluorobiphenyl) (perfluoroanthracenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{benzylnonylisopropylsiloxy}perfluoronapth-1- yl)bis(perfluorobiphenyl) (perfluoroanthracenyl)borate]7 dimethylsilyl
(tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [N,N- dimethyl-anilinium]+[(6-{cyclohexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluoronaphth-2-yl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [N,N-dimethyl-anilinium]+[(6-{cyclohexylisopropyl(tri- (isopropyl)silyloctyl)siloxy}perfluoronapth-1-yl) (pentafluoroanthracenyl) (perfluorophenyl)
(tetrafluorofluorenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{cyclohexylisopropyl(triethylsilylethyl)siloxy}perfluorofluoren-2-yl) (perfluoropyrenyl) (2,,3',5'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 diphenylmethyl
(fluorenyl) (cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{di-(isopropyl) (methyldiethylsilyloctyl)siloxy}perfluorofluoren-1-yl)bis(4,5,7-trifluoronaphthyl) (4,5,6- trifluoronaphthyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{hexyIisopropyl( triethylsilylpropyl)siloxy}- perfluoronapth-2-yl) (perfluoroanthracenyl) (4,5,6-trifluoronaphthyl) (4,5,7- trifluoronaphthyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-
{hexylisopropyl(methyldiethylsilyloctyl)siloxy}fluoroanthracen-2-yl)bis(perfluoroanthracenyl) (perfluorobiphenylaluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{isopropyl (3-ethylnonyl)hexylsiloxy}perfluoroanthracen-2-yl) (perfluorobiphenyl) (2',3',5'-trifluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6- {isopropylcyclohexylbenzylsiloxy}perfluoroinden-2-yI) (2,3,5-trifluorophenyl) (4,5,6- trifluoronaphthyl) (perfluorophenyl)aluminate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(6-{isopropylcyclohexylbenzylsiloxy}perfluoroinden-2-yl)
(2,3,5-trifluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{isopropylcyclohexylbenzylsiloxy}perfluoroinden-2-yl) (2,3,5- trifluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{isopropylhexyl(tri-n-propylsilylhexyl)siloxy}perfluoronapth-2-yl) (perfluoropyrenyl) (perfluorofluorenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilyl bis(2- methyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{isopropylnonyl( triethylsilylpropyl)siloxy}perfluorofluoren-1-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluoropyrenyl) (4,5,6-trifluoronaphthyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[N,N-dimethyl-anilinium]+[(6-{methyl (3-ethylnonyl)isopropylsiloxy}perfluoronapth-3-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{nonylbenzylisopropyIsiloxy}perfluorofluoren-2-yl)bis(perfluorophenyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{nonylisopropyl(t-butyl)siloxy}perfluoronapth-1-yl) (4,5,6-trifluoronaphthyl) (perfluoroanthracenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}fluoroanthracen-2-yl) (perfluorobiphenyl) (2',3',4'- trifluorobiphenyl) (tetrafluorofluorenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl)
(tert-butylamido) titanium dichloride; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}- fluoroanthracen-2-yl) (perfluorobiphenyl) (2',3',4'-trifluorobiphenyl) (tetrafluorofluorenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+t(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (perfluoropyrenyl) (pentalfluoropyrenyl) (perfluorobiphenyl)borate]7 isopropyl
(cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+f(6-{tri- (isopropyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorobiphenyl) (2',3',5,- trifluorobiphenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (2,3,5-trifluorophenyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri- (isopropyl)siloxy}perfluoroanthracen-2-yl)bis(perfluorobiphenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (2',3',4'-trifluorobiphenyl) (perfluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyI) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (2',3',4'-trifluorobiphenyl) (perfluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4- naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}- perfluorofluoren-1-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (4,5,6,7- tetrafluoronaphthyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluoropyrenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [N,N- dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorobiphenyl) (4,5,6,7- tetrafluoronaphthyl) (perfluoropyrenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (perfluorofluorenyl) (pentafluoroanthracenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(6-(tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl)
(perfluorofluorenyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (pentafluoroanthracenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [N,N- dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl)
(perfluoroanthracenyl) (perfluorobiphenyl)borate]7 di(4-n-propylphenyl)methylene (2;7-di-t- butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri- (isopropyl)siloxy}perfluoronaρhth-3-yl) (perfluoroanthracenyl) (perfluorophenyl) (2,3,4- trifluorophenyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-aniIinium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (pentafluoroanthracenyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)
(pentafluoroanthracenyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6- {tri-(isopropyl)siloxy}perfluoronapth-1 -yl) (perfluorofluorenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 (4-n-propylphenyl) (4-methylphenyI)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-
1-yl) (perfluorofluorenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(6-{tri- (isopropyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl)
(4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri- (isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)
(perfluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}perfIuoronapth-3-yl) (perfluorofluorenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilylbis(2- methylbenzindenyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(6-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluorophenyl) (2',3',4,-trifluorobiphenyl) (perfluoroanthracenyl)borate]-
/ (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [N,N- dimethyl-anilinium]+[(7-{( triethylsilylpropyl) (triethylsilylethyl)isopropylsiloxy}perfluoropyren-1- yl) (2,,3',5'-trifluorobiphenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(7-{(2,2- dimethyloctyl) (3-ethylnonyl)isopropylsiloxy}perfluoropyren-2-yl)bis(perfluorobiphenyl)
(perfluorophenylborate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl;
[N,N-dimethyl-anilinium]+[(7-{(2,2-dimethyloctyl) (tri-(isopropyl)silyloctyl)isopropylsiJpxy}- perfluorofluoren-1-yl) (pentafluoroanthracenyl) ( .S'^'-trifluorobiphenyl) (5,6,7,8- tetrafluoronaphthyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(2,2-dimethyloctyl) (triethylsilylethyl) (2,2- dimethyloctyl)siloxy}perfluorofluoren-2-yl) (perfluoroanthracenyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-(isopropyl)silyloctyl) (tri-n-propylsilylhexyl)isopropylsiloxy}- perfluoroinden-2-yl) (perfluorobiphenyl) (perfluoronaphthyl) (perfluorophenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri- (isopropyl)silyloctyl) (tri-n-propylsilylhexyl)isopropylsiloxy}perfluoronapth-1- yl)bis(perfluorobiphenyl) (perfluorophenyiborate]7 diphenylmethylene (2,7-di-t-butyl-5- methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-
(isopropyl)silyloctyl)isopropyl(methyldiethylsilylocty!)siloxy}perfluoropyren-1-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluoroanthracenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7- {(triethylsilylethyl)benzylisopropylsiloxy}perfluoronaphth-2-yl) (2,3,5-trifluorophenyl) (4,5,7- trifluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl;
[N,N-dimethyl-anilinium]+[(7-{(triethylsilylethyl)benzylisopropylsiloxy}perfluoronaphth-2-yl) (2,3,5-trifluorophenyl) (4,5,7-trifluoronaphthyl) (2, 3,4-trifluorophenyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(7-{(triethylsilylethyl)isopropyl(t-butyl)siloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7- {(triethylsilylhexyl)isopropyl(triethylsilylethyl)siloxy}perfluoroanthracen-1-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluoropyrenyl)aluminate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7- {(triethylsilylhexyl)isopropyl(trimethylsilylethyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl)
(2,3,4-trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-
{(triethylsilylhexyl)isopropyl(trimethylsilylethyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (2,3,4-trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium [(7-{(triethylsilylhexyl)n9nyl(methyldiethylsilyloctyl)siloxy}- perfluoronapth-1-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-n- propylsilylhexyl) (methyldiethylsilyloctyl) (t-butyl)siloxy}fluoronapth-1-yl)bis(perfluorophenyl) (2,3,6-trifluorophenylaluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-n-propylsilylhexyl)isopropyl(triethylsilylmethyl)siloxy}- perfluoronapth-1-yl)bis(2',3,,4'-trifluorobiphenyl) (perfluorophenyl)borate]7 dimethylsily- bisindenyl hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-n- propylsilylhexyl)isopropyl(triethylsilylmethyl)siloxy}perfluoronapth-1-yl)bis(2',3',4'- trifluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t- butyl fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{(tri-n- propylsilylhexyl)isopropyloctylsiloxy}perfluoronaphth-2-yl)bis(2',3',4'-trifluorobiphenyl) (perfluorophenylborate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{benzylisopropyl(triethylsilylethyl)siloxy}perfluoronapth-2- yl)bis(perfluoropyrenyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7- {benzylisopropy loctylsiloxy}perfluoronapth-1 -yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(7-{benzylisopropyloctylsiloxy}perfluoronapth-1-yl) (perfluoropyrenyl)
(perfluorobiphenyl) (perfluorophenyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [N,N-dimethyl-anilinium]+[(7-{cyciohexylisopropyl(tri- (isopropyl)silyloctyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(7-{cyclohexylisopropyl(tri-
(isopropyl)silyIoctyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [N,N- dimethyl-anilinium]+[(7-{cyclohexylisopropylnonylsiloxy}perfluoronapth-1- yl)bis(perfluorobiphenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [N,N- dimethyl-anilinium]+[(7-{di-((triethylsilylethyl))isopropylsiloxy}perfluoropyren-2-yl) (2',3',4'- trifluorobiphenyl) (perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 pentamethylcyclopentadienyl titanium trimethyl; [N,N-dimethyl-anilinium]+[(7-{di- ((triethylsilylhexyl))isopropylsiloxy}fluoronapth-1-yl)bis(perfluorophenyl) (2,3,5- trifluorophenyl)aluminate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{di- ((triethylsilylhexyl))isopropylsiloxy}fluoronapth-1-yl)bis(perfluorophenyl) (2,3,5- trifluorophenyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{di-(isopropyl)n-propylsiloxy}perfluoroinden-2-yl) (perfluorophenyl) (4,5,7-trifluoronaphthyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [N,N- dimethyl-anilinium]+[(7-{hexyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoroanthracen-1-yl) (pentafluoroanthracenyl) (perfluoronaphthyl) (perfluoropyrenyl)aluminate]7 dimethylsilyl bis(2- methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium] [(7- {hexyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl) (perfluorofluorenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(7-{hexylisopropyl(t-butyl)siloxy}perfluoroanthracen-1- yl)bis(tetrafluorofluorenyl) (perfluorofluorenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{hexylisopropyl(t-butyl)siloxy}perfluorofluoren- l-yl)bis(perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 dimethylsilyl bis(2-methyl- indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{isopropyl(triethylsilylethyl) (triethylsilylhexyl)siloxy}perfluoropyren-2-yl) (perfluoropyrenyl) (perfluoronaphthyl) (2,3,4- trifluorophenyl)aluminate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N- dimethyl-anilinium]+[(7-{isopropylcyclohexyl(triethylsilylmethyl)siloxy}perfluoronaphth-3-yl) (perfluoroanthracenyl) (2',3',4,-trifluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene
(2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-ani!inium]+[(7- {isopropylcyclohexyl(triethylsilylmethyl)siloxy}perfluoronapth-2-yl) (4,5,6,7-tetrafluoronaphthyl)
(tetrafluorofluorenyl) (2,3,4-trifluorophenyl)aluminate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium [(7-{methyl( triethylsilylpropyl) (methyldiethylsilyloctyl)siloxy}perfluoropyren-1-yl) (4,5,7-trifluoronaphthyl) (perfluorophenyl) (perfluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{nonylcyclohexyl(trimethylsilylethyl)siloχy}- perfluoronaphth-3-yl) (2',3,,5,-trifluorobiphenyl) (perfluorobiphenyl) (perfluoropyrenyl)aluminate]7 (4-n-propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium] [(7-{tri-(isopropyl)siloxy}- fluoroanthracen-1 -yl)bis(perfluorophenyl) (2,3,5-trifluorophenylborate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-
(isopropyl)siloxy}fluoronapth-2-yl)bis(4,5,6-trifluoronaphthyl) (perfluorophenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; tN,N-dimethyl-anilinium]+i(7-{tri- (isopropyl)siloxy}perfluoroanthracen-1 -yl) (5,6,7,8-tetrafluoronaphthyl) (perfluoroanthracenyl) (2,3,6-thfluorophenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; tN,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorophenyl) (perfluoroanthracenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (2,3,4- ^fluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)borate]7 diphenylmethyl (fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}- perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (pentalfluoropyrenyl)aluminate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyI)siloxy}perfluorofluoren-2-yl) (pentafluoroanthracenyl) (perfluorophenyl) (perfluoropyrenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}- perfluoroinden-2-yl) (perfluorophenyl) (perfluoronaphthyl) (4,5,6, 7-tetrafluoronaphthyl)borate " / dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoroinden-2-yl)bis(perfluorophenyl) (4,5,6-trifluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoronaphth-3- yl)bis(perfluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoronaphth-3- yl)bis(perfluorofluorenyl) (perfluorophenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}- perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (2,3,5-trifluorophenyl)aluminate]7 dimethylsilylbis(2-methylbenzindeny I) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (perfluoropyrenyl) (2',3',4'- trifluorobiphenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl) (4,5,7- trifluoronaphthyl) (5,6,7,8-tetrafluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7- {tri-(isopropyl)siloxy}perfluoronapth-3-yl) (2,3,4-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (2,3,4-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (2,3,4-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl) (perfluorobipheny!)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium] [(7-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluorophenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [N,N- dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl)aluminate]7 di(4-n-butylphenyl)methyiene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-3-yl)bis(perfluorofluorenyl) (perfluoronaphthyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-3-yl)bis(perfluorofluorenyl) (perfluoronaphthyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl) (pentafluoroanthracenyl) (perfluoroanthracenyl) (perfluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)bis(perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthylborate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl)bis(perfluorobiphenyl) (4,5,6,7- tetrafluoronaphthylborate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [N,N-dimethy!-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)bis(perfluorobiphenyl) (4,5,6J-tetrafluoronaphthylborate]7 pentamethylcyclopentadienyl titanium trimethy I; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (2,3,6-trifluorophenyl) (2,3,4-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 (4-n- butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (2,3,6- trifluorophenyl) (2,3,4-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 methylene (2,7-di-t- butyl fluorenyl) (fluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-2-yl)bis(perfluorobiphenyl) (4,5J-trifluoronaphthyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-
{(methyldiethylsilyloctyl)isopropylcyclohexylsiloxy}perfluoronapth-3-yI) (4,5,6-trifluoronaphthyl) (perfluorofluorenyl) (2,3,4-trifluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [N,N- dimethyl-anilinium]+[(8-{(methyldiethylsilyloctyl)isopropylcyclohexylsiloxy}perfluoronapth-3-yl) (4,5,6-trifluoronaphthyl) (perfluorofluorenyl) (2,3,4-trifluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N,N- dimethyl-anilinium]+[(8-{(triethylsilylethyl)benzylisopropylsiloxy}perfluoronapth-3- yl)bis(perfluorophenyl) (2,3,5-trifluorophenylborate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [N,N- dimethyl-anilinium]+[(8-{(trimethylsilylethyl) (2,2-dimethyloctyl)isopropylsiloxy}perfluoropyren- 2-yl) (2',3',5'-trifluorobiphenyl) (perfluorophenyl) (perfluorofluorenyI)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [N,N-dimethyl-anilinium]+[(8-
{di-(isopropyl) (triethylsilylhexyl)siloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (perfluoroanthracenyl)borate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl)
(cyclopentadienyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-{isopropyl(t- butyl)isopropyisiloxy}perfluoropyren-2-yl)bis(perfluorobiphenyl) (2',3',5'- trifluorobiphenylborate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(8-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (2,3,4-trifluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (5,6,7,8-tetrafluoronaphthyl) (4,5,7-trifluoronaphthyl) (perfluorobiphenyl)borate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2, 7-di-t-butyl-fluorenyl)hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-(tri-(isoproρyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (perfluoropyrenyl) (perfluorophenyl)aluminate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (2',3',4'-trifluorobiphenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [N,N-dimethyl-anilinium]+[(8-{tri-(isopropyl)siloxy}- perfluoroρyren-2-yl) (perfluoroanthracenyl) (perfluorobiphenyl) (4,5,7- trifluoronaphthyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [N,N-dimethyl-anilinium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethyl
(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N-methyl-N- dodecyl-anilinium]+[(4'-{(methyldiethylsilyloctyl)hexylisopropylsiloxy}perfluorobipheR-3-yl) (pentalfluoropyrenyl) (perfluoropyrenyl) (perfluoroanthracenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [N-methyl-N-dodecyl-anilinium]+[(4- {di-((tri-(isopropyl)silyloctyl)) (methyldiethylsilyloctyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (2,3,6-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium [(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3- yl)bis(perfluoroanthracenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4- naphth-2-yl-indenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(4-{tri- (isopropyl)siloxy}perfluorophenyl) (tetrafluorofluorenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [N- methyl-N-dodecyl-anilinium]+[(6-{(triethylsilylhexyl)isopropyl(triethylsilylethyl)siloxy}- perfluoroinden-2-yl)bis(perfluoroanthracenyl) (2,3,4-trifluorophenylaluminate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(6-{tri- (isopropyl)siloxy}perfluoronapth-2-yl)bis(perfluorobiphenyl) (perfluoropyrenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [N-methyl-N-dodecyl-anilinium [(7-{(2,2- dimethyloctyl)isopropyl(triethylsilylethyl)siloxy}fluoroinden-2-yl) (tetrafluorofluorenyl)
(perfluorophenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{(2,2- dimethyloctyl)isopropyl(triethylsilylethyl)siloxy}fluoroinden-2-yl) (tetrafluorofluorenyl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{(trimethylsilylethyl)
(triethylsilylethyl)isopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (perfluoroanthracenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{isopropyl(tri-n-propylsilylhexyl) (triethylsilylethyl)siloxy}perfluorofluoren-2-yl) (perfluoroanthracenyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{isopropylcyclohexyl (3- ethylnonyl)siloxy}perfluoropyren-1-yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 bis(4-triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{isopropylcyclohexyl (3-ethylnonyl)siloxy}- perfluoropyren-l-yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 methylene (indenyl)
(2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [N-methyl-N-dodecyl-anilinium]+[(7-{methyl( triethylsilylpropyl) (methyldiethylsilyloctyI)siloxy}perfluoropyren-1-yl) (2,3,6-trifluorophenyl) (perfluoroanthracenyl) (2,,3',4'-trifluorobiphenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [N-methyl-N- dodecyl-anilinium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluoropyrenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)aluminate]7 bis(1 ,3-dibutyl-methyl-cycIopentadienyl) zirconium dimethyl; [tri-3,5-dimethylphenylammonium]+[(4-{(2,2-dimethyloctyl)isopropyl (3- ethylnonyl)siloxy}perfluorophenyl) (4,5,7-trifluoronaphthyl) (perfluorofluorenyl) (2',3',4'- trifluorobiphenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [tri-3,5-dimethylphenylammonium]+[(4-{(2,2-dimethyloctyl)isopropyl (3- ethylnonyl)siloxy}perfluorophenyl) (4,5,7-trifluoronaphthyl) (perfluorofluorenyl) (2',3',4'- trifluorobiphenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-3,5-dimethylphenylammonium]+[(4-{(trimethylsilylethyl)isopropyl( triethylsilylpropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (tetrafluorofluorenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri- 3,5-dimethyIphenylammonium]+[(4-{(trimethylsilylethyl)isopropyl( triethylsilylpropyl)siloxy}- perfluorophenyl) (perfluorobiphenyl) (2,3,5-trifluorophenyl) (tetrafluorofluorenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-3,5- dimethylphenylammonium]+[(4'-{di-(isopropyl) (tri-(isopropyl)silyloctyl)siloxy}perfluorobiphen- 3-yl) (perfluorophenyl) (tetrafluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [tri-3,5- dimethylphenylammonium]+[(4'-{di-(isopropyl) (tri-(isopropyl)silyloctyl)siloxy}perfluorobiphen- 3-yl) (perfluorophenyl) (tetrafluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [tri-3,5- dimethylphenylammonium]+[(4'-{di-(isopropyl) (tri-(isopropyl)silyloctyl)siloxy}perfluorobiphen- 3-yl) (perfluorophenyl) (tetrafluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [tri-3,5- dimethylphenylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-1-yl)bis(perfluorophenyl)
(2,3,6-trifluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-3,5-dimethylphenylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2-y|) (perfluorofluorenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 diphenylmethylene (2,7- di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-3,5-dimethylphenylammonium]+[(7-{tri- (isopropyl)siloxy}fluoropyren-2-yl) (perfluoronaphthyl) (2',3',5'-trifluorobiphenyl)
(pentafluoroanthracenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7- dimethyl-fluorenyl) (indenyl) hafnium dibenzyl
; [tri-3,5-dimethylphenylammonium]+[(7-{tri-(isopropyl)siloxy}fluoropyren-2-yl) (perfluoronaphthyl) (2',3',5'-trifluorobiphenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-3,5- dimethylphenylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl) (2,3,6-trifluorophenyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [tri-3,5-dimethylphenyl-phosphonium]+[(4-{ (3-ethylnonyl)
(methyldiethylsilyloctyl)isopropylsiloxy}perfluorophenyl) (perfluorophenyl) (tetrafluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-3,5-dimethylphenyl-phosphonium]+[(4-{(t- butyl)nonyl(methyldiethylsilyloctyl)siloxy}perfluorophenyl)bis(perfluorobiphenyl) (perfluoropyrenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[tri-3,5-dimethylphenyl-phosphonium]+[(4-{hexylisopropylbenzylsiloxy}perfluorophenyl) (4,5,7- trifluoronaphthyl) (pentalfluoropyrenyl) (perfluorobiphenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-3,5- dimethylphenyl-phosphonium]+[(4'-{isopropylcyclohexyl(methyldiethylsilyloctyl)siloxy}- perfluorobiphen-4-yl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl) (pentalfluoropyrenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [trimethyl-phosphonium]+[(5-{ (3- ethylnonyl)isopropyl(tri-n-propylsilylhexyl)siloxy}perfluoroinden-1-yl) (4,5,7-trifluoronaphthyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyi) hafnium dimethyl; [trimethyl-phosphonium]+[(5-{ (3- ethylnonyl)isopropyl(tri-n-propyIsilylhexyl)siloxy}perfluoroinden-1-yl) (4,5,7-trifluoronaphthyl)
(5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trimethyl-phosphonium]+[(7-{di-((triethylsilylethyl))isopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (pentalfluoropyrenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trimethyl-phosphonium]+[(7-
{di-(isopropyl)benzylsiloxy}perfluoronapth-2-yl) (4,5,6-trifluoronaphthyl) (2,3,6-trifluorophenyl) (perfluorophenyl)aluminate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trimethyl-phosphonium] [(7-{di- (isopropyl)benzylsiloxy}perfluoronapth-2-yl) (4,5,6-trifluoronaphthyl) (2,3,6-trifluorophenyl) (perfluorophenyl)aluminate]7 pentamethyl cyclopentadienyl tribenzyl titanium;
[trimethyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (4,5,6- trifluoronaphthyl) (2,3,5-trifluorophenyl) (Z.^S'-trifluorobipheny boratefY bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyI)hafnium dimethyl; [trimethyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (pentafluoroanthracenyl) (4,5,7-trifluoronaphthyl) (perfluorobiphenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(4-{tri- (isopropyl)siioxy}perfluorophenyl) (2',3',4'-trifluorobiphenyl) (2,3,6-trifluorophenyl) (perfluorophenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-n- butyl-ammonium]+[(5-{hexylisopropyl( triethylsilylpropyl)siloxy}perfluoronaphth-3-yl) (5,6,7,8- tetrafluoronaphthyl) (perfluoropyrenyl) (perfluorofluorenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-n-butyl-ammonium]+[(5-{tri- (isopropyl)siloxy}perfluoroinden-2-yl) (2',3',5'-trifluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-n- butyl-ammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (perfluorophenyl) (perfluoroanthracenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluoropyrenyl) (perfluorobiphenyl) (2',3',4'-trifluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tri-n- butyl-ammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluoropyrenyl) (perfluorobiphenyl) (2',3',4'-trifluorobiphenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri- n-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n- butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl- indenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}- perfluoroanthracen-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri- (isopropyl)siloxy}perfluoroanthracen-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bisindenyl hafnium dimethyl; [tri-n- butyl-ammonium] [(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2^7- dimethylfluorenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}- perfluoroanthracen-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri- (isopropyl)siloxy}perfluoroinden-2-yl)bis(perfluorobiphenyl) (perfluoropyrenylaluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [tri-n-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}- perfluoronapth-1 -yl) (2',3',5'-trifluorobiphenyl) (4,5,6-trifluoronaphthyl) (perfluorobiphenyl)borate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-n-butyl-ammonium]+[(7-{(2,2-dimethyloctyl) (triethylsilylethyl) (2,2- dimethyloctyl)siloxy}perfluorofluoren-2-yl)bis(perfluorobiphenyl) (perfluorofluorenyl)aluminate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) ' zirconium dimethyl; [tri-n-butyl-ammonium]+[(7-{di-((t-butyl)) (3-ethylnonyl)siloxy}- perfluoronapth-2-yl)bis(perfluorofluorenyl) (4,5,6-trifluoronaphthyl)aluminate]7 di(4-n- butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(7- {methyl(triethylsilylethyl)isopropylsiloxy}fluoroinden-2-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-n-butyl-ammonium]+t(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [tri-n- butyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 diphenylmethylene (2,7-di-t-butyl-5- methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl) (2', 3', 5'-trifluorobiphenyl) (perfluoroanthracenyl) (perfluorophenyl)borate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [tri-n-butyl-ammonium]+[(8-{ (3-ethylnonyl)isopropyl(t- butyl)siloxy}perfluoronapth-3-yl) (pentalfluoropyrenyl) (2,3,6-trifluorophenyl)
(perfluorophenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; ltri-n-butyl-phosphonium]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorofluorenyl) (perfluorobiphenylaluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-n- butyl-phosphonium]+[(4-{(t-butyl) (methyldiethylsilyloctyl) (tri-n-propylsilylhexyl)siloxy}- perfluorophenyl) (2,3,6-trifluorophenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n- butyl-phosphonium]+[(4-{octyl(methyldiethylsilyloctyl)isopropylsiloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tri-n- butyl-phosphonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (pentafluoroanthracenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-n-butyl-phosphonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [tri-n- butyl-phosphonium]+t(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorobiphenyl) (perfluoropyrenylborate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tri-n- butyl-phosphonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorobiphenyl) (perfluoropyrenylborate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl;
[tri-n-butyl-phosphonium]+[(6-{di-((tri-(isopropyl)silyloctyl))isopropylsiloxy}perfluoroanthracen- 1-yl) (perfluorophenyl) (perfluorobiphenyl) (2,3,4-trifluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-n-butyl-phosphonium]+[(6-{nonylisopropyl(tri-n- propylsilylhexyl)siloxy}fluoronapth-3-yl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl) (2,3,6- trifluorophenyl)aluminate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [tri-n-butyl-phosphonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluoropyrenyl) (pentalfluoropyrenyl) (2',3',5'-trifluorobiphenyl)borate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n- butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}fluoroinden-2-yl) (perfluoronaphthyl) (perfluorobiphenyl) (2,,3',5'-trifluorobiphenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n- butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluoronaphthyl) (perfluoropyrenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-n-butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (perfluoropyrenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7
(tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [tri-n- butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl)bis(perfluoroanthracenyl) (pentafluoroanthracenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-ri-butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}- perfluoropyren-1-yl)bis(perfluoroanthracenyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [tri-N- octylammonium]+[(2'-{isopropyl(triethylsilylhexyl)isopropylsiloxy}perfluorobiphen-4-y|) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(2'-{octylisopropyl(tri- (isopropyl)silyloctyl)siloxy}perfluorobiphen-4-yl) (perfluoropyrenyl) (pentalfluoropyrenyl) (4,5,6- trifluoronaphthyl)borate]7 di(4-n-butylphenyl)methy!ene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N-octylammonium]+[(2'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluoropyrenylaluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(3'-{( triethylsilylpropyl) (triethylsilylethyl)cyclohexylsiloxy}perfluorobiphen-4- yl) (perfluorofluorenyl) (perfluoropyrenyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(3'-{( triethylsilylpropyl) (triethylsilyiethyl)cyclohexylsiloxy}perfluorobiphen-4-yl) (perfluorofluorenyl) (perfluoropyrenyl) (perfluorobiρhenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri- N-octylammonium]+[(3'-{( triethylsilylpropyl)isopropylnonylsiloxy}perfluorobiphen-4- yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 bis(trimethylsilyl) titanium dimethyl; [tri-N- octylammonium]+[(3'-{(rnethyldiethylsilyloctyl)benzylisopropylsiloxy}perfluorobiphen-4- yl)bis(perfluorophenyl) (perfluoropyrenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(3-{benzyl(triethylsilylethyl)isopropylsiloxy}- perfluorophenyl) (perfluorofluorenyl) (2',3',5'-trifluorobiphenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(3'-{benzylisopropyl(triethylsilylmethyl)siloxy}perfluorobiphen-4-yl)
(perfluorobiphenyl) (perfluoroanthracenyl) (perfluorofluorenyl)borate]7 diphenylmethylene
(cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(3'- {benzylisopropyl(triethyIsilylmethyl)siloxy}perfluorobiphen-4-yl) (perfluorobiphenyl) (perfluoroanthracenyl) (perfluorofluorenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl;
[tri-N-octylammonium]+[(3-{di-((t-butyl)) (3-ethylnonyl)siloxy}fluorophenyl) (perfluoropyrenyl) (4,5,6-trifluoronaphthyl) (perfluorofluorenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(3-{di-((t-butyl)) (3- ethylnonyl)siloxy}fluorophenyl) (perfluoropyrenyl) (4,5,6-trifluoronaphthyl) (perfluorofluorenyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium] [(3-{di-(hexyl)isopropylsiloxy}fluorophenyl) (4,5,6- trifluoronaphthyl) (perfluoroanthracenyl) (perfluoronaphthyl)borate]7 dimethylsilylbiβ(2- methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(3'-{tri-(isopropyl)siloxy}- fluorobiphen-4-yl) (pentalfluoropyrenyl) (perfluoroanthracenyl) (perfluoronaphthyl)borate]7 (4- n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tri-N-octylammonium]+[(3'-{tri-(isopropyl)siloxy}fluorobiphen-4-yl) (pentalfluoropyrenyl) (perfluoroanthracenyl) (perfluoronaphthyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-N-octylammonium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,5- trifluorophenyl) (tetrafluorofluorenyl) (pentalfluoropyrenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(3-{tri- (isopropyl)siIoxy}perfluorophenyl) (2,3,5-trifluorophenyl) (tetrafluorofluorenyl) (pentalfluoropyrenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-
N-octylammonium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(3-{tri- (isopropyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6- trifluoronaphthyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [tri-N- octylammonium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(3-{tri-(isopropyl)siloxy}- perfluorophenyl)tris(perfluorophenyl)aluminate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(3-{tri-(isopropyl)siloxy}- ' perfluorophenyl)tris(perfluorophenyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammoniumf[(4-{ (3-ethylnonyl) ( triethylsilylpropyl)isopropylsiloxy}perfluorophenyl) (pentafluoroanthracenyl) (perfluorophenyl) (2,3,5-trifluorophenyl)aluminate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(4'-{(methyldiethylsilyloctyl) (triethylsilylhexyl)
(triethylsilylmethyl)siloxy}perfluorobiphen-3-yl)bis(perfluorophenyl) (perfluoroanthracenyl)aluminate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(4'-{(tri-(isopropyl)silyloctyl) (3- ethylnonyl) (2,2-dimethyloctyl)siloxy}perfluorobiphen-4-yl) (tetrafluorofluorenyl) (2,3,4- trifluorophenyl) (2,3,5-trifluorophenyl)aluminate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{(triethylsilylethyl)isopropyl(2,2- dimethyloctyl)siloxy}perfluoroρhenyl)bis(perfluorophenyl) (perfluoropyrenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4'- {(triethylsilylmethyl)isopropylbenzylsiloxy}perfluorobiphen-3-yl) (tetrafluorofluorenyl) (perfluorophenyl) (perfluoroanthracenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [tri-N-octyIammonium]+[(4-{(tri-n-propylsilylhexyl) (methyldiethylsilyloctyl) (t-butyl)siloxy}perfluorophenyl) (perfluorophenyl) (perfluoroanthracenyl) (perfluorobiphenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{(tri-n-propylsilylhexyl)isopropyl( triethylsilylpropyl)siloxy}- perfluorophenyl)bis(perfluorobiphenyl) (2,3,5-trifluorophenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyi)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{(tri-n-propylsilylhexyl)isopropyl( triethylsilylpropyl)siloxy}- perfluorophenyl)bis(perfluorobiphenyl) (2,3,5-trifluorophenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4'-{di- (cyclohexyl) (tri-(isopropyl)silyloctyl)siloxy}perfluorobiphen-4-yl) (tetrafluorofluorenyl) (perfluoroanthracenyl) (perfluorophenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4'-{di-(isopropyl) (triethylsilylhexyl)siloxy}perfluorobiphen-3-yl)
(perfluorofluorenyl) (perfluorobiphenyl) (perfluoroanthracenyl)borate]7 (4-alkylphenyl) (4-t- butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{di-(isopropyl)ethylsiloxy}perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-
{ethyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluorophenyl)bis(tetrafluorofluorenyl) (2,3,4- trifluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammonium]+[(4-{hexyl(triethylsilylhexyl)isopropylsiloxy}- perfluorophenyl)bis(2',3,,4,-trifluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilylbis(2- methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(4-{isopropyl (3-ethylnonyl)
(methyldiethylsilyloctyl)siloxy}perfluorophenyl)bis(perfluoroanthracenyl) (perfluorophenyl)borate]7 bis(4-triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl- fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(4-{isopropyl(2,2- dimethyloctyl)isopropylsiloxy}perfluorophenyl) (perfluorofluorenyl) (2,3,6-trifluorophenyl) (Z.S'.δ'-trifluorobipheny borater dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{isopropyl(t-butyl) (tri-(isopropyl)siIyloctyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (perfluoroanthracenyl)borate]7 bis(1,3-dibutyl-methyl- cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(4'- {isopropyl(trimethylsilylethyl)isopropylsiloxy}perfluorobiphen-3-yl) (perfluoropyrenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [tri-N-octylammonium]+[(4-{isopropylhexyl( triethylsilylpropyl)siloχy}- perfluorophenyl) (2,3,6-trifluorophenyl) (perfluoropyrenyl) (tetrafluorofluorenyl)borate]7 (4-n- propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{isopropylnonyl( triethylsilylpropyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluorofluorenylaluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(4'-{nonylisopropyl(t-butyl)siloxy}fluorobiphen-4-yl)bis(perfluorophenyl) (4,5,7-trifluoronaphthylborate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}fluorophenyl) (2',3',4'- trifluorobiphenyl) (2',3',5'-trifluorobiphenyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [tri-N- octylammonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl) (2',3',4'-trifluorobiphenyl) (2,3,6-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl) (perfluorophenyl) (2,3,4-trifluorophenyl) (perfluoronaphthyl)aluminate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [tri-N- octylammonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluoroanthracenyl) (pentalfluoropyrenyl)aluminate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2, 7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri- N-octylammonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorofluorenyl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octyIammonium]+[(4'-{tri- (isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorophenyl) (perfluorofluorenyl)
(perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(4'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4'-{tri- (isopropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N- octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,4-trifluorophenyl) (475,7- trifluoronaphthyl) (perfluoropyrenyl)borate]7 dimethylsilyl bisindenyl hafnium dimethyl; [tri-N- octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,4-trifluorophenyl) (4,5,7- trifluoronaphthyl) (perfluoropyrenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [tri- N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,5-trifluorophenyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,6- trifluorophenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [tri-N- octylammonium]'*' [(4-{tri-(isopropyl)siloxy}perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluoroanthracenyl) (2,3,6-trifluorophenyl)aluminate]7 diphenylmethyl (cylcopentadienyl)
(2,7-dimethylfluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl) (5,6,7,8- tetrafluoronaphthyl)aluminate]7 dimethylsilyl bis(2-proρyl-indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoroanthracenyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl)
(adamantyl-1 -amino) titanium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl) (perfluoroanthracenyl) (2,3,5-trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N- octylammonium]'*' [(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoroanthracenyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-proρyl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [tri-N-octylammonium] [(4-{tri-(isopropyl)siloxy}- perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-
{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoronaphthyl) (pentalfluoropyrenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-
(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl) (2,3,4- trifluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2J-di-t-butyl-fluoreπyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl)aluminate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl) (perfluorophenyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (2',3',4'- trifluorobiphenyl) (2,3,5-trifluorophenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (tetrafluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl) (2', 3", 5'-trifluorobiphenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-
(isopropyl)siloxy}perfluorophenyl)bis(pentalfluoropyrenyl) (perfluorofluorenylborate]7 (4-n- propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorobiphenyl) (pentalfluoropyrenylborate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorobiphenyl) (pentalfluoropyrenylborate]7 diphenylmethylene (2,7- di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri- (isopropyl)siloxy}perfluorophenyl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 dimethylsily (bisindenyl) zirconium dichloride; [tri-N-octylammonium] [(4-{tri- (isopropyl)siloxy}perfluorophenyl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (pentalfluoropyrenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenyl)aluminate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl ; [tri-N-octylammonium]+[(4-{tri-(isopropyl)siloxy}- perfluorophenyl)bis(perfluorophenyl) (perfluoroanthracenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(5- {(methyldiethylsilyloctyl) (triethylsilylmethyl)cyclohexylsiloxy}fluoronapth-3-yl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl (indenyl)
(fluorenyl) hafnium dihydride; [tri-N-octylammonium]+[(5- {(triethylsilylethyl)isopropylnonylsiloxy}ρerfluoronapth-2-yl) (perfluoropyrenyl) (perfluorobiphenyl) (5,6,7, 8-tetrafluoronaphthyl)borate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2, 7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(5-{(triethylsilylheχyl) (3-ethylnonyl)isopropylsiloxy}perfluoronapth-2- yl) (2',3',4'-trifluorobiphenyl) (perfluorobiphenyl) (perfluorophenyl)aluminate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{(tri-n- propylsilylhexyl)isopropyl(triethylsilylmethyl)siloxy}fluoronapth-3-yl) (perfluorofluorenyl) (perfluoroanthracenyl) (perfluoropyrenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(5-{(tri-n- propylsilylhexyl)isopropyl(triethylsilylmethyl)siloxy}perfluoroinden-2- yl)bis(perfluoroanthracenyl) (perfluoropyrenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyi) hafnium di-t-butyl; [tri-N-octylammonium]+[(5-{di-((tri-n- propylsilylhexyl)) (triethylsilylethyl)siloxy}perfluoroinden-1-yl)tris(perfluorophenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{di-(isopropyl)benzylsiloxy}perfluoroinden-2-yl) (pentafluoroanthracenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N- octylammonium]+[(5-{di-(isopropyl)benzylsiloxy}perfluoronapth-1-yl) (5,6,7,8- tetrafluoronaphthyl) (perfluorophenyl) (2', S'.δ'-trifluorobipheny aluminatefV diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(5-{hexyl(tri-n-propylsilylhexyl)isopropylsiloxy}perfluoroinden-2-yl) (2',3',5'- trifluorobiphenyl) (2,3,5-trifluorophenyl) (perfluorobiphenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(5-{isopropyl (3- ethylnonyl)isopropylsiloxy}perfluoroinden-2-yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]~ / (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N- octylammonium]+[(5-{isopropyl (3-ethylnonyl)isopropylsiloxy}perfluoroinden-2- yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bisindenyl hafnium dimethyl; [tri-N-octylammonium]+[(5-{isopropyl(t-butyl) (triethylsilylmethyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(5-{isopropyl(triethylsilylethyl) (trimethylsilylethyl)siloxy}perfluoroinden-1-yl)
(5,6,7,8-tetrafluoronaphthyl) (2',3',5'-trifluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [tri-N-octylammonium]'li[(5- {isopropylcyclohexyIisopropylsiloxy}perfluoronapth-1-yl)tris(perfluorophenyl)borate]7 bis(4- triethylsilylphenyl)methyIene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri- N-octylammonium]+[(5-{octyl(triethylsilylethyl) (triethylsilylmethyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [tri-N-octylammonium]+[(5-{octyl(triethylsilylethyl)
(triethylsilylmethyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{octylisopropyloctylsiloxy}- perfluoronapth-2-yl) (5,6,7,8-tetrafluoronaphthyl) (4,5,7-trifluoronaphthyl) (perfluorofluorenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl- fluorenyl) (indenyl) hafnium dibenzyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siioxy}- fluoronapth-3-yl) (pentafluoroanthracenyl) (tetrafluorofluorenyl) (perfluσrobiphenyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{tri- (isopropyl)siloxy}perfluoroinden-1-yl) (perfluorophenyl) (4,5,6-trifluoronaphthyl) (tetrafluorofluorenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl)
(indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-1- yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (2,7- di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(5- {tri-(isopropyl)siloxy}perfluoroinden-1-yl)bis(tetrafluorofluorenyl) (4,5,6- trifluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl-fluorenyl)
(indenyl) hafnium dibenzyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-2- yl) (pentalfluoropyrenyl) (2,3,5-trifluorophenyl) (perfluorobiphenyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}- perfluoroinden-2-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (perfluorofluorenyl)borate]7 (4- alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-
N-octylammonium]'*' [(5-{tri-(isopropyl)siloxy}perfluoronaphth-1-yl) (perfluorophenyl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronaphth-1- yl)tris(perfluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [tri-N- octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluoropyrenyl) (perfluorophenyl) (2',3',5'-trif!uorobiphenyl)borate]7 (tetramethyl-cyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-l-yl)bis(perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [tri-N- octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorophenyl) (4,5,6,7- tetrafluoronaphthyl)aluminate]7 methylene bis(fiuorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1 -yl)bis(perfluorophenyl) (4,5,6,7- tetrafluoronaphthyl)aluminate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [tri-N- octylammonium3+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorophenyl) (5,6,7,8- tetrafluoronaphthylborate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-1 -yl)tris(tetrafluorofluorenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [tri-N- octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorobiphenyl) (perfluorofluorenyl) (2,3,4-trifluorophenyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium] [(5-{tri-(isopropyl)siloxy}perfluoronapth- 2-yl) (perfluorobiphenyl) (perfluoropyrenyl) (perfluoronaphthyl)aluminate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorophenyl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [tri-N-octylammonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (2,3,5-trifluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 (4-n-butylphenyl) (4- t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(5- {tri-(isopropyl)siloxy}perfluoronapth-3-yl)tris(perfluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{ (3-ethylnonyl) (methyldiethylsilyloctyl)isopropylsiloxy}fluoroanthracen-2-yl) (perfluorobiphenyl) (2,3,5- trifluorophenyl) (2',3',4'-trifluorobiphenyl)aluminate]7 diphenylmethylene (cyclopentadienyl)
(2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium] [(6-{ (3- ethylnonyl)benzylisopropylsiloxy}fluoronapth-3-yl)bis(perfluorofluorenyl) (2',3,,5'- trifluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{( triethylsilylpropyl) (triethylsilylethyl)isopropylsiloxy}- perfluoronapth-1-yl) (4,5,6-trifluoronaphthyl) (2,3,4-trifluorophenyl) (perfluorobiphenyl)borate]" / (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{( triethylsilylpropyl)benzylisopropylsiloxy}- fluorofluoren-1-yl) (2,3,6-trifluorophenyl) (pentafluoroanthracenyl) (2,3,4- trifluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{(2,2-dimethyloctyi)isopropyl (3-ethylnonyl)siloxy}perfluoroanthracen-1-yl) (4,5,6,7-tetrafluoronaphthyl) (5,6,7,8- tetrafluoronaphthyl) (perfluorobiphenyl)aluminate]7 dimethylsily-bisindenyl hafnium dimethyl;
[tri-N-octyIammonium]+[(6-{(methyldiethylsilyloctyl)nonyl( triethylsilylpropyl)siloxy}- perfluoronaphth-1-yl) (perfluorophenyl) (perfluorofluorenyl) (perfluoropyrenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6- {(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2-dimethyloctyi)siloxy}perfluoronaphth-3- yl)bis(perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(6-{(tri- (isopropyl)silyloctyl) (3-ethylnonyl) (2,2-dimethyloctyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{(tri-(isopropyl)silyloctyl)isopropyl (3-ethylnonyl)siloxy}fluoronapth-1-yl)
(5,6,7,8-tetrafluoronaphthyl) (2',3',4'-trifluorobiphenyl) (perfluoropyrenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{(triethylsilylethyl) (2,2-dimethyloctyl)isopropylsiloxy}perfluorofluoren-1-yl) (2,3,5-trifluorophenyl) (2,,3',5,-trifluorobiphenyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-
N-octylammonium]+[(6-{(triethylsilylethyl) (2,2-dimethyloctyl)isopropylsiloxy}perfluorofluoren-1- yl) (2,3,5-trifluorophenyl) (2,,3',5,-trifluorobiphenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{(triethylsilylethyl)isopropyl(tri-n-propylsilylhexyl)siloxy}ρerfluorofluoren-1- yl) (2,3,5-trifluorophenyl) (perfluorobiphenyl) (perfluoroanthracenyi)aluminate]7 (4-n- butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tri-N-octylammonium]+[(6-{(triethylsilylethyl)isopropyl(tri-n-propyIsilylhexyl)siloxy}- perfluorofluoren-1-yl) (2,3,5-trifluorophenyl) (perfluorobiphenyl) (perfluoroanthracenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{(triethylsilylethyl)isopropylbenzylsiloxy}perfluorofluoren-2-yl) (4,5,6,7-tetrafluoronaphthyl) (2',3',5'-trifluorobiphenyl) (perfluorophenyl)aluminate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N- octylammonium]+[(6-{(triethylsilylhexyl)isopropylcyclohexylsiloxy}perfluoroanthracen-2- yl)bis(perfluoroanthracenyl) (pentalfluoropyrenylborate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(6- {(triethylsilylmethyl)isopropylbenzylsiloxy}perfluorofluoren-1-yl) (pentalfluoropyrenyl) (perfluoropyrenyl) (perfluoroanthracenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-N-octylammonium]+[(6-{(tri-n-propylsilylhexyl)isopropyl(tri-
(isopropyl)silyloctyl)siloxy}perfluoroanthracen-2-yl) (perfluorobiphenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{di-( (3- ethylnonyl))isopropylsiloxy}perfluoroanthracen-2-yl)bis(2',3',4'-trifluorobiphenyl) (tetrafluorofluorenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{di-((tri-(isopropyl)silyloctyl)) (methyldiethylsilyloctyl)siloxy}- perfluoroinden-2-yl) (perfluorophenyl) (4,5,6-trifluoronaphthyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{di-((triethylsilylmethyl))isopropylsiloxy}fluoroinden-2- yl)tris(perfluorobiphenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{di-(isopropyl) (3-ethylnonyl)siloxy}perfluoroanthracen-1- yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorofluorenyl) (2',3',4'-trifluorobiphenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(6- {ethyl(2,2-dimethyloctyl)hexylsiloxy}perfluoronapth-3-yl) (2,3,4-trifluorophenyl) (perfluorophenyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl)
(dodecylamido) hafnium dihydride; [tri-N-octylammonium]+[(6-{hexylisopropyl(t-butyl)siloxy}- perfluoroanthracen-2-yl) (2',3',5'-trifluorobiphenyl) (perfluorobiphenyl) (2,3,5- trifluorophenyl)aluminate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [tri-N- octylammonium]+[(6-{isopropyl(2,2-dimethyloctyl) (methyldiethylsilyloctyl)siloxy}- perfluoronapth-l-yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{isopropyl(2,2- dimethyloctyl)isopropylsiloxy}perfluorofluoren-1-yl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 di(4-n-butylphenyl)methylene (2,7- dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N-octylammonium] [(6- {isopropyl(tri-(isopropyl)silyloctyl) (3-ethylnonyl)siloxy}perfluorofluoren-1-yl) (perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{isopropyl(tri-(isopropyl)silyloctyl) (3-ethylnonyl)siloxy>- perfluorofluoren-1-yl) (perfluorophenyl) (perfluorobiphenyl)
(pentafluoroanthracenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{isopropyl(tri-(isopropyl)silyloctyl)benzylsiloxy}- perfluoroanthracen-2-yl) (perfluorofluorenyl) (perfluorophenyl) (2,3,6- trifluorophenyl)aluminate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-N- octylammonium]+[(6-{isopropyl(triethylsilylethyl) (triethylsilylhexyl)siloxy}perfluorofluoren-1- yl)bis(perfluorophenyl) (2,3,5-trifluorophenylborate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammoniumJ+[(6- {isopropyl(triethylsilylethyl) (triethylsilylhexyl)siloxy}perfluorofluoren-1-yl)bis(perfluorophenyl) (2,3,5-trifluorophenylborate]7 methylene bis(fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{isopropyl(triethylsilylhexyl) (triethylsilylmethyl)siloxy}perfluoroanthracen-
1-yl) (perfluorophenyl) (perfluoronaphthyl) (4,5,7-trifluoronaphthyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{methyl(triethylsilylethyl)isopropylsiloxy}perfluoronapth-3-yl) (pentalfluoropyrenyl) (perfluorophenyl) (perfluoroanthracenyl)aluminate]7 dimethylsilylbis(2- methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(6- ,
{methyl(triethylsilylethyl)isopropylsiloxy}perfluoronapth-3-yl) (pentalfluoropyrenyl) (perfluorophenyl) (perfluoroanthracenyl)aluminate]7 diphenylmethyl (cylcopentadienyl) (2,7- di-t-butyl-fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{octyl(triethylsilylethyl) (triethylsilylmethyl)siloxy}perfluoronapth-2-yl) (2',3',5'-trifluorobiphenyl) (pentalfluoropyrenyl) (perfluorofluorenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium] [(6-{octyl(trimethylsilylethyl) (methyldiethylsilyloctyl)siloxy}perfluorofluoren-2-yl) (perfluoronaphthyl) (4,5,6- trifluoronaphthyl) (perfluoropyrenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di- t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}- fluorofluoren-1-yl) (pentafluoroanthracenyl) (perfluorophenyl) (perfluoroanthracenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}fluoroinden-2-yl) (perfluoropyrenyl) (perfluoroanthracenyl) (perfluorophenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}fluoronapth-3-yl) (perfluorophenyl) (4,5,6-trifluoronaphthyl) (2,3,6-trifluorophenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}perfluoroanthracen-1-yl) (4,5,6,7-tetrafluoronaphthyl) (5,6,7,8- tetrafluoronaphthyl) (perfluoroanthracenyl)aluminate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6- {tri-(isopropyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorobiphenyl) (perfluoropyrenylaluminate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1- yl)bis(perfluorobiphenyl) (perfluoropyrenylaluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (perfluorophenyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (perfluorophenyl) (perfluorobiphenyl) (perfluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl)bis(perfluorophenyl) (4,5,6, 7-tetrafluoronaphthylaluminate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}- perfluorofluoren-1-yl) (2',3',5'-trifluorobiphenyl) (4,5,6-trifluoronaphthyl)
(perfluorophenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (4,5,6-trifluoronaphthyl) (perfluoroanthracenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}perfIuorofluoren-2-yl) (perfluorophenyl) (tetrafluorofluorenyl)
(pentafluoroanthracenyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (tetrafluorofluorenyl) (pentafluoroanthracenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}- perfluorofluoren-2-yl) (perfluoropyrenyl) (4,5,7-trifluoronaphthyl) (tetrafluorofluorenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluorofIuoren-2-yl) (perfluoropyrenyl) (4,5,7- trifluoronaphthyl) (tetrafluorofluorenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t-butyl- 5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}perfluorofluoren-2-yl)bis(perfluorobiphenyl) (perfluorophenylborate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}perfluoroinden-2-yl) (2,3,5-trifluorophenyl) (2,3,6-trifluorophenyl)
(perfluorophenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (2,3,5- trifluorophenyl) (perfluorobiphenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (2,7-di-n- butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri- (isopropyl)siloxy}perfluoroinden-2-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)
(perfluorobiphenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorofluorenyl) (perfluoroanthracenyl) (perfluorophenyl)aluminate]7 (4-alkylphenyl) (4-t- butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorofluorenyl)
(perfluoroanthracenyl) (perfluorophenyl)aluminate]7 dimethylsilyl bis(2-methyl-4-phenyl- indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2- yl) (perfluorofluorenyl) (perfluoroanthracenyl) (perfluorophenyl)aluminate]7 dimethylsilyl bis(2- propyl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}- perfluoronaphth-2-yl)bis(perfluorofluorenyl) (perfluoropyrenyl)aluminate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}- perfluoronaphth-2-yl)bis(perfluorofluorenyl) (perfluoropyrenyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronaphth-2-yl)bis(perfluorofluorenyl) (perfluoropyrenyl)aluminate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronaphth-2- yl)bis(perfluorophenyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronaphth-2-yl)bis(perfluorophenyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronaphth-2- yl)bis(perfluorophenyl) (pentalfluoropyrenyl)borate]7 methylene (indenyl) (2,7-di-Λutyl- fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronaphth- 3-yl)bis(2',3',4'-trifluorobiphenyl) (4,5,7-trifluoronaphthylborate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6- {tri-(isopropyi)siloxy}perfluoronaphth-3-yl)bis(2',3',4' -trifluorobiphenyl) (4,5,7- trifluoronaphthylborate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth- 1-yl) (perfluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl)aluminate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl;
[tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorophenyl) (perfluorofluorenylborate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (pentalfluoropyrenyl) (perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-
(isopropyl)siloxy}perfluoronapth-3-yl) (pentalfluoropyrenyl) (perfluorophenyl) (2,3,6- trifluorophenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluoroanthracenyl) (perfluorophenyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [tri-N-octylammonium]+[(6-{tfi-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluoroanthracenyl) (perfluorophenyl) (pentalfluoropyrenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorophenyl) (pentalfluoropyrenyl) (Σ'.S'.δ'-trifluorobipheny boraterV bis(1 ,3-dibutyl-methyl- cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(7-{ (3- ethylnonyl)isopropyl(triethylsilylethyl)siloxy}perfluorofluoren-2-yl)bis(2,3,6-trifluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium] [(7-{ (3- ethylnonyl)isopropylcyclohexylsiloxy}perfluoroanthracen-1-yl) (perfluoronaphthyl) (perfluorobiphenyl) (2,3,4-trifluorophenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl;
[tri-N-octylammonium]+[(7-{( triethylsilylpropyl) (triethylsilylethyl)isopropylsiloxy}- perfluoropyren-1-yl)bis(perfluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{( triethylsilylpropyl)isopropyl(tri-n-propylsilylhexyl)siloxy}perfluorofluoren-1- yl)bis(perfluorophenyl) (4,5,6-trifluoronaphthyl)aluminate]7 dimethylsilyl bis(2-methyl-4- naphth-2-yl-indenyl) hafnium dimethyl; [tri-N-octylammonium] [(7- {(methyldiethylsilyloctyl)isopropylhexylsiloxy}perfluorofluoren-1-yl) (tetrafluorofluorenyl)
(perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-N-octylammonium]+[(7-{(tri-(isopropyl)silyloctyl) (tri-n- propyIsilylhexyl)isopropylsiloxy}perfluoropyren-2-yl) (perfluorobiphenyl) (perfluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(7-{(triethylsilylethyl)
(methyldiethylsilyloctyl)isopropylsiloxy}fluoroanthracen-1-yl)bis(perfluorophenyl) (2,3,4- trifluorophenyi)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-N- octylammonium]+[(7-{(triethylsilylhexyl)isopropyl(t-butyl)siloxy}fluorofluoren-1-yl) (perfluoroanthracenyl) (perfluorophenyl) (perfluoropyrenyl)aluminate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammonium]+[(7-
{(triethylsilylhexyl)isopropyl(t-butyl)siloxy}perfluorofluoren-1-yl) (perfluorophenyl) (pentalfluoropyrenyl) (4,5,6-trifluoronaphthyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [tri-N-octylammonium]+[(7-{benzylisopropyl( triethylsilylpropyl)siloxy}- perfluoronapth-2-yl) (perfluoroanthracenyl) (perfluorophenyl) (2,3,δ-trifluorophenyl)borate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl;
[tri-N-octylammonium]+[(7-{benzylisopropyl( triethylsilylpropyl)siloxy}perfluoronapth-2-yl) (perfluoroanthracenyl) (perfluorophenyl) (2,3,5-trifluorophenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tri-N- octylammonium]+[(7-{di-((triethylsilylhexyl))isopropylsiloxy}perfluoropyren-2- yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tri-N- octylammonium]+[(7-{di-((triethylsilylhexyl))isopropylsiloxy}perfluoropyren-2- yl)bis(perfluorobiphenyl) (perfluorophenyI)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{di-(cyclohexyl) (tri-(isoproρyl)silyloctyl)siloxy}- fluoronapth-3-yl)bis(perfluorobiphenyl) (perfluoroanthracenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium] [(7-{di- (isopropyl)cyclohexylsiloxy}fluoroanthracen-1-yl) (4,5,7-trifluoronaphthyl) (perfluoroDhenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{di-(isopropyl)cyclohexylsiloxy}fluoroanthracen-1-yl) (4,5,7- trifluoronaphthyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{di-(isopropyl)n- propylsiloxy}perfluoroinden-2-yl)bis(perfluorophenyI) (perfluorobiphenylborate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [tri-N- octylammonium]+[(7-{hexyl(2,2-dimethyloctyl)isopropylsiloxy}perfluoropyren-2-yl) (perfluoropyrenyl) (2,3,4-trifluorophenyl) (perfluoronaphthyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri- N-octylammonium]+[(7-{hexyl(2,2-dimethyloctyl)isopropylsiloxy}perfluoropyren-2-yl) (perfluoropyrenyl) (2,3,4-trifluorophenyl) (perfluoronaphthyl)borate]7 dimethylsilyl
(tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammonium]+[(7- {hexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}fluoropyren-1-yl) (perfluoronaphthyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7- {isopropyl( triethylsilylpropyl) (3-ethylnonyl)siloxy}perfluoronapth-1-yl) (tetrafluorofluorenyl)
(2',3',4'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 bis(1,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(7-{isopropyl( triethylsilylpropyl) (3- ethylnonyl)siloxy}perfluoronapth-1-yl) (tetrafluorofluorenyl) (2',3',4'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [tri-N-octylammonium]+[(7-{isopropyl( triethylsilylpropyl) (3- ethylnonyl)siloxy}perfluoronapth-1 -y I) (tetrafluorofluorenyl) (2',3',4'-trifluorobipheny I) (perfluorobiphenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(7-{isopropy l( triethylsilylpropyl) (3-ethy lnonyl)siloxy}perfluoronapth-1 - yl) (tetrafluorofluorenyl) (2',3',4'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [tri-N- octylammonium]+[(7-{isopropyl( triethylsilylpropyl)isopropylsiloxy}perfluoronapth-2- yl)bis(perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthylborate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7- {isopropyl(t-butyl)cyclohexylsiloxy}perfluoropy ren-1 -yl) (perfluorobiphenyl) (perfluorophenyl) (perfluoropyrenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{isopropyl(triethylsilylethyl) ( triethylsilylpropyl)siloxy}- perfluorofluoren-1-yl)tris(perfluorophenyl)borate]7 dimethylsilylbis(tetrahydroindenyj) zirconium dichloride; [tri-N-octylammonium]+[(7-{isopropyl(triethylsilylhexyl) (methyldiethylsilyloctyl)siloxy}perfluoronapth-1-yl)bis(perfluorobiphenyl) (perfluorofluorenylborate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{isopropylcyclohexyl(methyldiethylsilyloctyl)siloxy}fluorofluoren-1- yl)bis(4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-
{isopropylcyclohexyl(methyldiethylsilyloctyl)siloxy}fluorofluoren-1-yl)bis(4,5,6,7- tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7- dimethyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium] +[(7- {isopropylcyclohexyl(triethylsilylmethyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluoroanthracenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{isopropyicyclohexyl(triethylsilylmethyl)siloxy}- perfluoronapth-1-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluoroanthracenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{isopropylcyclohexyl(triethylsilylmethyl)siloxy}perf:luoronapth-1-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluoroanthracenyl)borate]7 methylene (2,7-di-t- butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{isopropylnonyl(tri- (isopropyl)silyloctyl)siloxy}perfluoropyren-2-yl)bis(perfluorophenyl)
(pentalfluoropyrenylborate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri- N-octylammonium]+[(7-{nonylisopropyl(methyldiethylsilyloctyl)siloxy}perfluoroinden-2-yl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [tri-N- octylammonium]+[(7-{nonylisopropyl(tri-n-propylsilylhexyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (pentalfluoropyrenyl) (perfluorofluorenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7- {octyl(methyldiethylsilyloctyl) (t-butyl)siloxy}fluorofluoren-2-yl) (2,3,6-trifluorophenyl) (2',3',5'- trifluorobiphenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{octyl(triethylsilylethyl) (triethylsilylmethyl)siloxy}perfluoroanthracen-1-yl) (perfluoronaphthyl) (perfluorophenyl) (4,5,6- trifluoronaphthyl)borate]7 bis(4-triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(7-{octyl(triethylsilylethyl)
(triethylsilylmethyl)siloxy}perfluoronaphth-1-yl) (4,5,7-trifluoronaphthyl) (perfluorophenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1- amino) titanium dimethyl; [tri-N-octylammonium]+[(7-{octylisopropyl( triethylsilylpropyl)siloxy}- perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (4,5,6,7- tetrafluoronaphthyl)borate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium] [(7-{octyIisopropyl( triethylsilylpropyl)siloxy}perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert- butylamido) titanium dichloride; [tri-N-octylammonium]+[(7-{octylisopropyl(tri- (isopropyl)silyloctyl)siloxy}perfluoroanthracen-1-yl)bis(perfluoropyrenyl) (pentalfluoropyrenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}fluoroanthracen-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluoroanthracenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}fluoroanthracen-1-yl) (5,6,7,8- tetrafluoronaphthyl) (perfluoroanthracenyl) (2,3,5-trifluorophenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}fluorofluoren-1-yl) (perfluorobiphenyl) (perfluorophenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride;
[tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}fluorofluoren-1 -yl) (perfluorobiphenyl) (perfluorophenyl) (pentafluoroanthracenyl)aluminate]7 methylene bis(fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}fluoropyren-1-yl) (4,5,6- trifluoronaphthyl) (perfluorophenyl) (pentalfluoropyrenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}fluoropyren-2-yl) (2,3,4-trifluorophenyl) (2',3',5'- trifluorobiphenyl) (perfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}- perfluoroanthracen-1-yl) (2,3,6-trifluorophenyl) (perfluorobiphenyl) (perfluorofluorenyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (2,3,4-trifluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetrarnethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl)bis(perfluorobiphenyl) (4,5,6,7-tetrafluoronaphthylborate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfIuorofluoren-1-yl) (4,5,7- trifluoronaphthyl) (perfluoronaphthyl) (perfluorobiphenyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyi)siloxy}perfluorofluoren-1-yl) (4,5,7-trifluoronaphthyl) (perfluoronaphthyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7- dimethylfluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}- perfluorofluoren-1-yl) (4,5,7-trifluoronaphthyl) (perfluoronaphthyl) (perfluorobiphenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [tri-N-octylammonium]+[(7-{tri-
(isopropy!)siloxy}perfluorofluoren-1-yl)bis(perfluorophenyl) (2,3,4-trifluorophenylborate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (2,3,4-trifluorophenyl) (4,5,7- trifluoronaphthyl) (2', 3', 5'-trifluorobiphenyl)aluminate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammonium]+[(7-{tri-
(isopropyl)siloxy}perfluorofluoren-2-yl) (4,5,7-trifluoronaphthyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (4,δ,7-trifluoronaphthyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluprofluoren-2-yl)
(pentalfluoropyrenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 methylene (indenyl) (2,7- di-t-butyl-fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}- perfluorofluoren-2-yl)bis(perfluorobiphenyl) (perfluoroanthracenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yI) (pentafluoroanthracenyl)
(perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t- butylamino) titanium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroinden- 2-yl) (perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (2,3,6-trifluorophenyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}perfluoroinden-2-yl)bis(perfluorobiphenyl) (perfluorophenylborate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tri- N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorofluorenyl) (2,3,6- trifluorophenyl) (perfluorobiphenyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluoronaphthyl) (4,5,6- trifluoronaphthyl) (2,,3',5'-trifluorobiphenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (2,3,4- trifluorophenyl) (2,3,5-trifluorophenyl) (perfluorophenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-2-yl) (2,3,4-trifluorophenyl) (2,3,5-trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (2,3,5- trifluorophenyl) (perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorophenyl) (2,3,5- trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl- indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2- yl) (perfluorophenyl) (2,3,6-trifluorophenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl)bis(perfluorofluorenyl) (4,5,6,7- tetrafluoronaphthyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-3-yl)
(perfluorobiphenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 bis(1,3-dibutyl-methyl- cyclopentadienyl) zirconium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (pentafluoroanthracenyl)
(perfluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-3-yl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yI) (2',3',4'- trifluorobiphenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl) (4,5,7-trifluoronaphthyl) (perfluorophenyl) (2',3',4'- trifluorobiphenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)bis(perfluorophenyl) (perfluoronaphthyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl)bis(tetrafluorofluorenyr) (2',3,,5'- trifluorobiphenylaluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (2',3,,4'-trifluorobiphenyl) (perfluorobiphenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (perfluoroanthracenyl) (2',3',4'- trifluorobiphenyl) (5,6,7, 8-tetrafiuoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl- indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2- yl) (perfluorophenyl) (perfluoronaphthyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-N-octylammonium]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (4,5,6,7- tetrafluoronaphthyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [tri-N-octylammonium]+[(8-{(2,2-dimethyloctyl) (3-ethylnonyl) ( triethylsilylproρyl)siloxy}perfluoronapth-3-yl)bis(perfluorophenyl) (tetrafluorofluorenylborate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(8-{(triethylsilylethyl)octylisopropylsiloxy}perfluoropyren-2-yl) (2',3',4'- trifluorobiphenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [tri-N- octylammonium]+[(8-{(tri-n-propylsilylhexyl) (methyldiethylsilyloctyl)isopropylsiloxy}- perfluoropyren-2-yl) (pentafluoroanthracenyl) (2,3,4-trifluorophenyl) (pentalfluoropyrenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(8-{(tri-n-propylsilylhexyl) (methyldiethylsilylocty))isopropylsiloxy}perfluoropyren-2-yl) (pentafluoroanthracenyl) (2,3,4- trifluorophenyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-N-octylammonium]+[(8-{(tri-n-propylsilylhexyl) (triethylsilylhexyl)isopropylsiloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (2',3,,4'- trifluorobiphenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N-octylammonium]+[(8-{di-((methyldiethylsilyloctyl)) (tri-(isopropyl)silyloctyl)siloxy}- perfluoropyren-2-yl) (perfluorobiphenyl) (perfluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 (4- n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [tri-N- octylammonium]+[(8-{di-(isopropyl) (triethylsilylhexyl)siloxy}fluoropyren-2- yl)bis(perfluorophenyl) (perfluorobiphenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t- butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-N-octylammonium]+[(8-{di-(isopropyl) (triethylsilylhexyl)siloxy}fluoropyren-2-yl)bis(perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [tri-N-octylammonium]+[(8- {isopropyl(t-butyl)nonylsiloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (pentalfluoropyrenylborate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-N- octylammonium]+[(8-{isopropylcyclohexyl (3-ethylnonyl)siloxy}perfluoronapth-3- yl)bis(perfluorofluorenyl) (2,3,5-trifluorophenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(8-{isopropylcyclohexyl (3-ethylnonyl)siloxy}perfluoronapth-3- yl)bis(perfluorofluorenyl) (2,3,5-trifluorophenyl)aluminate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [tri-N-octylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl)
( .S'^'-trifluorobiphenyl) (4,5,7-trifluoronaphthyl) (perfluoroanthracenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [tri-N- octylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tri-N- octylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (4,5,6-trifluoronaphthyl)
(perfluorofluorenyl) (perfluorobiphenyl)aluminate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-N-octylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (perfluorophenyl) (4,5,7-trifluoronaphthyl) (perfluoronaphthyl)aluminate]7 di(4-n- butyiphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-N- octylammonium]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl) (perfluorophenyl) (4,5,7- trifluoronaphthyl) (perfluoronaphthyl)aluminate]7 dimethylsily (bisindenyl) zirconium dichloride; [trioctyl-ammonium]+[(3'-{nonyl(triethylsilylethyl)isopropylsiloxy}perfluorobiphen-4- yl) (perfluorophenyl) (perfluoropyrenyl) (4,5,7-trifluoronaphthyl)aluminate]7 dimethylsilyl bis(2- propyl-indenyl) hafnium dimethyl; [trioctyl-ammonium]+[(3'- {nonyl(triethylsilylethyl)isopropylsiloxy}perfluorobiphen-4-yl) (perfluorophenyl)
(perfluoropyrenyl) (4,5,7-trifluoronaphthyl)aluminate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [trioctyl-ammonium]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorobiphenyl) (perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [trioctyl-ammonium]+[(4'-{(2,2-dimethyloctyl)cyclohexyl( triethylsilylpropyl)siloxy}- perfluorobiphen-4-yl)bis(perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trioctyl-ammonium]+[( - {(triethylsilylethyl) (trimethylsilylethyl)hexylsiloxy}perfluorophenyl) (perfluoronaphthyl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 dimethylsily (bisindenyl) zirconium dichloride; [trioctyl-ammonium]+[(4'-{(trimethylsilylethyl) (triethylsilylethyl) (methyldiethylsilyIoctyl)siloxy}perfluorobiphen-3-yl) (perfluoroanthracenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride;
[trioctyl-ammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorofluorenyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyi) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [trioctyl-ammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorofluorenyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trioctyl-ammonium] [(5-{(t- butyl)hexyl(triethylsilylethyl)siloxy}perfluoroinden-1-yl) (2,3,4-trifluorophenyl) (pentafluoroanthracenyl) (perfluorophenyl)aluminate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trioctyl-ammonium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-2-yl) (perfluorophenyl) (pentalfluoropyrenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trioctyl-ammonium]+[(6-{(triethylsilylethyl)benzylisopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (perfluoroanthracenyl) (perfluorobiphenyl)aluminate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trioctyl-ammonium]+[(6-{di-((methyldiethylsilyloctyl))isopropylsiloxy}perfluoronapth-1-yl)
(perfluoroanthracenyl) (perfluoronaphthyl) (perfluorobiphenyl)borate]7 methylene (2,7-di-t- butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trioctyl-ammonium]+[(6-{tri-(isopropyl)siloxy}- fluoronapth-2-yl) (perfluorophenyl) (2',3,,4'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trioctyl-ammonium]+[(6-{tri-(isopropyl)siloxy}fluoronapth-2-yl)tris(perfluorophenyl)aluminate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [trioctyl-ammonium]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-1-yI)bis(perfluorophenyl) (4,5,6,7-tetrafluoronaphthylborate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(3-{tri- (isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl) (5,6,7,8- tetrafluoronaphthyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl; [trioctyl-phosphonium]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl) (5,6,7, 8-tetrafluoronaphthyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(4-{cyclohexyl( triethylsilylpropyl)(sopropylsiloxy}perfluorophenyl)bis(2,3,5-trifluorophenyl)
(perfluoropyreny!)aluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trioctyl-phosphonium]+[(4-{ethyl (3-ethylnonyI) (methyldiethylsilyloctyl)siloxy}- perfluorophenyl)tris(perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(6-{tri- (isopropyl)siloxy}fluoronapth-2-yl) (4,5,7-trifluoronaphthyl) (perfluorobiphenyl)
(perfluorofluorenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl- -amino) titanium dimethyl; [trioctyl-phosphonium]+[(6-{tri-(isopropyl)siloxy}fluoronapth-2-yl) (4,5,7- trifluoronaphthyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [trioctyl-phosphontum]+[(6-{tri-(isopropyl)siloxy}fluoronapth-2-yl) (4,5,7-trifluoronaphthyl)
(perfluorobiphenyl) (perfluorofluorenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(7-{(triethylsilylmethyl)isopropyl(2,2- dimethyloctyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trioctyl-phosphonium]+[(7-{hexyl(triethylsilylmethyl) (2,2-dimethyloctyl)siloxy}perfluorofluoren-
1-yl) (2,3,6-trifluorophenyl) (2,3,5-trifluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetra ethylcyclopentadienyl) (adamantylamido) titanium dichloride; [trioctyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-2-yl)bis(perfluorophenyl) (2,3,4- trifluorophenyl)aluminate] dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [trioctyl-phosphonium]+[(8-{octyl(tri-n-propylsilylhexyl) ( triethylsilylpropyl)siloxy}fluoronapth-3-yl)bis(perfluorophenyl) (pentafluoroanthracenyl)borate]~ / dimethylsily (bisindenyl) zirconium dichloride; [tripropyl-ammonium]+[(3- {octyl(trimethylsilylethyl) (methyldiethylsilyloctyl)siloxy}perfluorophenyl) (4,5,7- trifluoronaphthyl) (perfluoronaphthyl) (2,3,5-trifluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl;
[tripropyl-ammonium]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-y|) (2',3',4'-trifluorobiphenyl) (pentalfluoropyrenyl) (perfluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di- t-butyl-fluorenyl) hafnium dimethyl; [tripropyl-ammonium]+[(4'-{(triethylsilylmethyl) ( triethylsilylpropyl) (triethylsilylmethyl)siloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 bis(trimethylsilyl) titanium dimethyl; [tripropyl-ammonium]+[(4'- {(triethylsilylmethy!) ( triethylsilylpropyl) (triethylsilylmethyl)siloxy}perfluorobiphen-4- yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tripropyl-ammonium]+[(4- {benzylisopropylhexylsiloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (perfluorofluorenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [tripropyl-ammonium]+[(4'-{tri-(isopropyl)siloxy}- perfluorobiphen-3-yl) (perfluoropyrenyl) (perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]~
/ di(4-n-propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [tripropyl-ammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2',3',4'- trifluorobiphenyl) (perfluorophenyl) (2,3,4-trifluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [tripropyl-ammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)
(perfluorophenyl) (4,5,7-trifluoronaphthyl)a!uminate]7 dimethylsilyl bis(2-methyl-4-phenyl- indenyl) hafnium dimethyl; [tripropyl-ammonium]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (pentalfluoropyrenyl) (perfluoronaphthyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tripropyl-ammonium]+[(7-{( triethylsilylpropyl)benzylisopropylsiloxy}perfluoroinden-2-yl) (4,δ,6-trifluoronaphthyl) (2,3,5- trifluorophenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [tripropyl-ammonium]+[(7-{(2,2- dimethyloctyl) (3-ethylnonyl) ( triethylsilylpropyl)siloxy}perfluoroinden-2-yl) (tetrafluorofluorenyl) (perfluorophenyl) (2,3,4-trifluorophenyl)aluminate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[tripropyl-ammonium]+[(7-{(2,2-dimethyloctyl) (3-ethylnonyl) ( triethylsilylpropyl)siloxy}- perfluoroinden-2-yl) (tetrafluorofluorenyl) (perfluorophenyl) (2,3,4-trifluorophenyl)aluminate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tripropyl-ammonium]+[(7-{(2,2- dimethyloctyl) (3-ethylnonyl) ( triethylsilylpropyl)siloxy}perfluoroinden-2-yl) (tetrafluorofluorenyl) (perfluorophenyl) (2,3,4-trifluorophenyl)aluminate]7 diphenylmethyl
(fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tripropyl-ammonium]+[(7- {octylisopropyloctylsiloxy}perfluoronapth-3-yl) (2,3,6-trifluorophenyl) (5,6,7,8- tetrafluoronaphthyl) (2,3,5-trifluorophenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [tripropyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (4,5,6- trifluoronaphthyl) (2,3,6-trifluorophenyl) (tetrafluorofluorenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [tripropyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (2,3,6- trifluorophenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [tripropyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (tetrafluorofluorenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [tripropyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)bis(perfIuorophenyl) (perfluorobiphenylaluminate]7 dimethylsily (bisindenyl) zirconium dichloride;
[tripropyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (perfluorobiphenylaluminate]7 methylene bis(fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(3-{ (3-ethylnonyl)isopropyl(t-butyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamanty 1-1 -amino) titanium dimethyl;
[tripropyl-phosphonium]+[(3-{ (3-ethylnonyl)isopropyl(t-butyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(3-{ (3- ethylnonyl)isopropyl(t-butyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [tripropyl-phosphonium [(3-{ (3-ethylnonyl)isopropyl(t-butyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(3-{ (3- ethylnonyl)isopropyl(t-butyl)siloxy}perfluorophenyl) (perfluorobiphenyl)
(pentafluoroanthracenyl) (perfluoropyrenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(4-{(trimethylsilylethyl) (t-butyl) (triethylsilylethyl)siloxy}- perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(4-{(trimethylsilylethyl) (t-butyl) (triethylsilylethyl)siloxy}perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)
(perfluorobiphenyl) (perfluorofluorenyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(δ-{(triethylsilylmethyl) ( triethylsilylpropyl) (triethylsilylmethyl)siloxy}perfluoroinden-1 -yl) (perfluoroanthracenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [tripropyl-phosphonium]+[(5-{(triethylsilylmethyl) ( triethylsilylpropyl) (triethylsilylmethyl)siloxy}- perfluoroinden-1-yl) (perfluoroanthracenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido). hafnium dimethyl; [tripropyl-phosphonium]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluoroanthracenyl) (2,3,4-trifluorophenyl) (perfluorophenyl)borate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tripropyl-phosphonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (pentafluoroanthracenyl)
(2',3',4' -trifluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(5-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl)bis(perfluorophenyl) (perfluoroanthracenyl)aluminate]7 methylene (2,7-di- t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(6-{(t- butyl)nonyl(methyldiethylsilyloctyl)siloxy}perfluoronapth-2-yl) (perfluorophenyl)
(perfluorobiphenyl) (2,3,5-trifluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7- methyl-fluorenyl) hafnium dimethyl; [tripropyl-phosphonium]+[(6-{tri-(isopropyl)siloxy}- perfluoronaphth-3-yl) (perfluoropyrenyl) (2',3',5'-trifluorobiphenyl) (perfluorobiphenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [tripropyl-phosphonium]+l(6-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (4,5,7-trifluoronaphthyl)
(2,3,4-trifluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 bis(4-
(triethylsilyi)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [tripropyl-phosphonium]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (2,3,5-trifluorophenyl) (perfluorophenyl) (perfluoroanthracenyl)aluminate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [tripropyl-phosphonium [(6-{tri-(isopropyl)siloxy}perfluoronapth-
3-yl) (2,3,5-trifluorophenyl) (perfluorophenyl) (perfluoroanthracenyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [tripropyl-phosphonium]+[(7-{isopropyl(triethylsilylhexyl) (triethylsilylmethyl)siloxy}- perfluoroanthracen-l-yl)bis(perfluorophenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [tri-t- butyl-ammonium]+[(4-{(trimethylsilylethyl)isopropyl(triethylsilylmethyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-t- butyl-ammonium]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [tri-t-butyl-ammonium]+[(5-{(trimethylsilylethyl)hexylisopropylsiloxy}perfluoronapth- 2-yl)bis(perfluorophenyl) (pentalfluoropyrenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [tri-t- butyl-ammonium]+[(5-{(tri-n-propylsilylhexyl) (methyldiethylsilyloctyl)isopropylsiloxy}- perfluoronapth-2-yI) (perfluorobiphenyl) (2,3,6-trifluorophenyl) (perfluoronaphthyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [tri-t- butyl-ammonium]+[(6-{(triethylsilylhexyl)isopropylcyclohexylsiloxy}perfluoroanthracen-1-yl)
(perfluoropyrenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4- phenyl-indenyl) hafnium dimethyl; [tri-t-butyl-ammonium]+[(6-{di-(isopropyl)benzylsiloxy}- perfluoroanthracen-2-yl) (pentafluoroanthracenyl) (4,5,7-trifluoronaphthyl) (4,5,6,7- tetrafluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [tri-t-butyl-ammonium]+[(6-{isopropyloctylisopropylsiloxy}perfluoronapth-1- yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 diphenylmethylene(cylcopentadienyl) (2,7- methyl-fluorenyl) hafnium dimethyl; [tri-t-butyl-ammonium]+[(6-{tri-(isopropyl)siloxy}- perfluorofluoren-2-yl)bis(perfluorobiphenyl) (4,5,7-trifluoronaphthylborate]7 di(4-n- butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [tri-t- butyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (4,5,7-trifluoronaphthyl)
(perfluoropyrenyl) (perfluorophenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-t-butyl-ammonium]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1 -yl) (perfluorobiphenyl) (perfluoronaphthyl) (pentalfluoropyrenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [tri-t-butyl-ammonium] [(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl) (perfluorobiphenyl) (2,3,6-trifluorophenyl) (2',3',5'- trifluorobiphenyl)aluminate]7 di(4-n-propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [tri-t-butyl-phosphonium]+[(2'-{tri-(isopropyl)siloxy}- perfIuorobiphen-4-yl) (2'13',5,-trifluorobiphenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [tri-t-butyl-phosphonium]+[(4-{isopropyl(tri-n- propylsilylhexyl)isopropylsiloxy}perfluorophenyl)bis(5,6J,8-tetrafluoronaphthyl) (perfluorobiphenylboratefY dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [tri-t- butyl-phosphonium]+[(δ-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorophenyl) (perfluoropyrenyl) (4,5,6-trifluoronaphthyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [tri-t- butyl-phosphonium]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (2,3,5-trifluorophenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [tri-t-butyl-phosphonium]+[(6-{di-(isopropyl)ethylsiloxy}perfluoronaphth-2- yl) (2',3',δ'-trifluorobiphenyl) (perfluorobiphenyl) (δ,6,7,8-tetrafluoronaphthyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [tri-t-butyl-phosphonium]+[(6-{di- (isopropyl)ethylsiloxy}perfluoronaphth-2-yl) (2',3',δ'-trifluorobiphenyl) (perfluorobiphenyl) (δ,6,7,8-tetrafluoronaphthyl)borate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [tri-t-butyl-phosphonium]+[(7-{tri-(isopropyl)siloxy}perfluorofludren-2-yl) (perfluorophenyl) (2,3,4-trifluorophenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [tri-t-butyl-phosphonium]+[(7- {tri-(isopropyl)siloxy}perfluoronapth-1-yl)bis(perfluorophenyl) (pentafluoroanthracenyl)borate]- / bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl;
[trityl]+[(2'-{isopropyl(triethylsilylhexyl)cyclohexylsiloxy}perfluorobiphen-4-yl) (4,5,7- trifluoronaphthyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 (4-n-propylphenyl) (4- isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trityl]+[(2'- {isopropyl(triethylsilylhexyl)isopropylsiloxy}fluorobiphen-4-yl) (perfluoronaphthyl) (perfluoropyrenyl) (perfluorobiphenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(2'-{isopropyl(triethylsilylhexyl)isopropylsiloxy}fluorobiphen-4-yl) (perfluoronaphthyl) (perfluoropyrenyl) (perfluorobiphenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [trityl]+[(2'- {isopropyl(trimethylsilylethyl) (2,2-dimethyloctyl)siloxy}perfluorobiphen-4-yl) (4,5,6,7- tetrafluoronaphthyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(2- {isopropyl(trimethylsilylethyl) (2,2-dimethyloctyl)siloxy}perfluorobiphen-4-yl) (4,5,6,7- tetrafluoronaphthyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(2'- {isopropyl(trimethylsilylethyl) (2,2-dimethyloctyl)siloxy}perfluorobiphen-4-yl) (4,5,6,7- tetrafluoronaphthyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(2'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)>. (perfluorobiphenyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(2'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t- butyI-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(2'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6-trifluoronaphthyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(2'-{tri-
(isopropyl)siloxy}perfluorobiphen-4-yl)bis(5,6,7,8-tetrafluoronaphthyl) (pentafluoroanthracenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7- di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(2'-{tri-(isopropyl)siloxy}perfluorobiphen-4- yl)bis(perfluoropyrenyl) (perfluorofluorenyl)borate]7 (tetramethyl-cyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(3'-{ (3-ethylnonyl) (t-butyl)
(triethylsily!ethyl)siloxy}perfluorobiphen-4-yl) (perfluorophenyl) (2,3,6-trifluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [trityl]+[(3-{( triethylsilylpropyl)hexylisopropylsiloxy}perfluorophenyl) (perfluorophenyl) (2,3,4-trifluorophenyl) (perfluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[trityl]+[(3-{( triethylsilylpropyl)hexylisopropylsiloxy}perfluorophenyl) (perfluorophenyl) (2,3,4- trifluorophenyl) (perfluoronaphthy!)aluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(3-{(methyldiethylsilyloctyl)isopropyl(t-butyl)siloxy}fluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(3-{(methyldiethylsilyloctyl)isopropyl(t-butyl)siloxy}fluorophenyl)
(perfluorobiphenyl) (perfluorophenyl) (4,5J-trifluoronaphthyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(3-{(methyldiethylsilyloctyl)isopropyl(t-butyl)siloxy}fluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [trityl]+[(3- {(triethylsilylethyl)isopropyl(methyldiethylsilyloctyl)siloxy}perfluorophenyl) (tetrafluorofluorenyl)
(perfluoropyrenyl) (ρerfluorophenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(3 - {benzyl(trimethylsilylethyl)isopropylsiloxy}perfluorobiphen-4-yl)bis(perfluorophenyl) (perfluorofluorenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(3-{benzylnonylisopropylsiloxy}perfluorophenyl)
(perfluorophenyl) (pentalfluoropyrenyl) (2,3,6-trifluorophenyl)aluminate]7 dimethylsilyl bis(2- propyl-indenyl) hafnium dimethyl; [trityl]+[(3-{benzylnonylisopropylsiloxy}perfluorop.henyl) (perfluorophenyl) (pentalfluoropyrenyl) (2,3,6-trifluorophenyl)aluminate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(3- {benzylnonylisopropylsiloxy}perfluorophenyi) (perfluorophenyl) (pentalfluoropyrenyl) (2,3,6- trifluorophenyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl] [(3-{di-((methyldiethylsilyloctyl))cyclohexylsiloxy}- perfluorophenyl) (perfluorobiphenyl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 (4-n- butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(3-{di-((methyldiethylsilyloctyl))cyclohexylsiloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t- butyl fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(3'-
{isopropyl(triethylsilylethyl)isopropylsiloxy}perfluorobiphen-4-yl) (perfluoroanthracenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trityl]+[(3'- {isopropyl(triethylsilylethyl)isopropylsiloxy}perfluorobiphen-4-yl) (perfluoroanthracenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(3-{isopropyloctyl(triethylsilylethyl)siloxy}perfluorophenyl) (perfluoroanthracenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 diphenylmethylene (2,7- di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(3'-{tri-(isopropyl)siloxy}fluorobiphen- 4-yl) (pentafluoroanthracenyl) (perfluorofluorenyl) (perfluoronaphthyl)aluminate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trityl]+[(3-
{tri-(isopropyl)siloxy}fluorophenyl) (perfluorofluorenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 (4-n-propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(3-{tri-(isopropyl)siloxy}fluorophenyl) (perfluorofluorenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trityl]+[(3-{tri-(isopropyl)siloxy}fluorophenyl)
(perfluorofluorenyl) (tetrafluorofluorenyl) (perfluorophenyl)borate]7 diphenylmethylene (2,7-di- t-butyl-δ-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(3-{tri- (isopropyl)siloxy}fluorophenyl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluoroanthracenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)
(perfluorophenyl) (perfluorobiphenyl) (pentafluoroanthracenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityJ]+[(3'-{tri- (isopropyl)siloxy}perfluorobiphen-4-yl) (tetrafluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)borate]7 dimethylsilyl bisindenyl hafnium dimethyl; [trityl [(3'-(tri- (isopropyl)siloxy}perfluorobiphen-4-yl)bis(pentalfluoropyrenyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(3'-{tri- (isopropyl)siloxy}perfluorobiphen-4-yl)bis(pentalfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl; [trityl]+[(3'-{tri-
(isopropyl)siloxy}perfluorobiphen-4-yl)bis(pentalfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [trityl] [(3'-{tri-(isopropyl)siloxy}- perfluorobiphen-4-yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(3'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl)bis(perfluorobiphenyl)
(perfluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [trityl]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorofluorenyl) (perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(3-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoronaphthyl) (perfluorophenyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl bis(2-methyl-4-phenyl- indeny!) hafnium dimethyl; [trityl]+[(4'-{ (3-ethylnonyl) (tri-(isopropyl)silyloctyl)isopropylsiloxy}- fluorobiphen-3-yl)bis(perfluorophenyl) (perfluoropyrenylborate]7
(tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(4'-{ (3- ethylnonyl) (tri-(isopropyl)silyloctyl)isopropylsiloxy}fluorobiphen-3-yl)bis(perfluorophenyl) (perfluoropyrenylborate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl;
[trityl]+[(4-{ (3-ethylnonyl)benzylisopropylsiloxy}perfluorophenyl) (2',3,,5'-trifluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl) (2,3,5-trifluorophenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [trityl]+[(4-{ (3- ethylnonyl)benzylisopropylsiloxy}perfluorophenyl) (2',3',5'-trifluorobiphenyl) (5,6,7,8- tetrafluoronaphthyl) (2,3,5-trifluorophenyl)aluminate]7 diphenylmethylene (2,7-di-t-butyl-5- methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(4-{( triethylsilylpropyl)isopropyl(triethylsilylmethyl)siloxy}perfluorophenyl)bis(perfluorophenyl) (perfluorobiphenylborate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [trityl]+[(4'-{(t-butyl) (2,2-dimethyloctyl) (t-butyl)siloxy}perfluorobiphen-3- yl)bis(2,3,4-trifluorophenyl) (perfluoropyrenyl)borate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(4-{(t-butyl)isopropyl(triethylsilylhexyl)siloxy}perfluorophenyl) (2,3,6-trifluorophenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(4-{(triethylsilylethyl) (trimethylsilylethyl)benzylsiloxy}- perfluorophenyl)bis(perfluorofluorenyl) (perfluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(4- {benzylnonyl(methyldiethylsilyloctyl)siloxy}perfluorophenyl) (2,3,6-trifluorophenyl) (2,3,4- trifluorophenyl) (2,,3,,5'-trifluorobiphenyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(4'-{di-(isopropyl) (trimethylsilylethyl)siloxy}perfluorobiphen-4-yl) (perfluorofluorenyl) (perfluoronaphthyl) (perfluoroρhenyl)borate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [trityl]+[(4'-{di-(isopropyl) (trimethylsilylethyl)siloxy}perfluorobiphen-4-yl)
(perfluorofluorenyl) (perfluoronaphthyl) (perfluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(4-{hexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluorophenyl) (pentafluoroanthracenyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(4-{hexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluorophenyl)
(pentafluoroanthracenyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 di(4-n- propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(4-{isopropyl(methyldiethylsilyloctyl)nonylsiloxy}perfluorophenyl)bis(perfluorophenyl) (perfluorobiphenyl)borate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trityl]+[(4-{isopropyl(triethylsilylethyl) (triethylsilylhexyl)siloxy}- perfluorophenyl) (2,3,5-trifluorophenyl) (perfluoroanthracenyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(4'-{tri- (isopropyl)siloxy}perfluorobiphen-3-yl)bis(perfluorobiphenyl) (perfluorophenylborate]7 (4-n- propylphenyl) (4-isopropylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl] [(4'-{tri-(isopropyl)siloxy}perfluorobiphen-3-yl)bis(perfluorophenyl)
(perfluoroanthracenyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(4'-{tri-(isopropyl)siloxy}perfluorobiphen-4-yl) (pentafluoroanthracenyl) (4,5,6-trifluoronaphthyl) (perfluorobiphenyl)aluminate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [tritylf[(4-{tri- (isopropyl)siloxy}perfluorophenyl) (2',3',4'-trifluorobiphenyl) (4,5,6-trifluoronaphthyl)
(perfluorophenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (2,3,&- trifluorophenyl) (2',3',4'-trifluorobiphenyl) (2,3,6-trifluorophenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(4- tri-(isopropyl)siloxy}perfluorophenyl) (2,3,5- trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [trityl]+[(4-{tri- (isopropyl)siloxy}perfluorophenyl) (pentalfluoropyrenyl) (perfluorobiphenyl)
(perfluorophenyl)borate]7 dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [trityl]+[(4- {tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (2',3',5'-trifluorobiphenyl) (pentafluoroanthracenyl)aluminate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [trityl]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [trityl]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluorobiphenyl) (perfluorophenyl) (perfluorofIuorenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl) (perfluoronaphthyl) (perfluorophenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trityl]+[(4-{tri-(isopropyi)siloxy}perfluorophenyl)
(perfluorophenyl) (perfluorobiphenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [trityl]+[(4-{tri- (isopropyl)siloxy}perfluorophenyl) (perfluoropyrenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [trityl]+[(4-{tri-(isopropyl)siloxy}perfluorophenyl)bis(perfluoroanthracenyl)
(pentafluoroanthracenylborate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(4-{tri-(isopropyl)siioxy}- perfluorophenyl)bis(perfluorobiphenyl) (tetrafluorofluorenyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(5-{ (3-ethylnonyl) (methyldiethylsilyloctyl)isopropylsiloxy}fluoroinden-1-yl) (perfluorophenyl) (perfluorobiphenyl)
(5,6,7,8-tetrafluoronaphthyl)aluminate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(5-{(2,2-dimethyloctyl) (triethylsilylethyl) (2,2-dimethyloctyl)siloxy}perfluoroinden-1-yl) (perfluorophenyl) (perfluoroanthracenyl) (4,5,6-trifluoronaphthyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [trityl]+[(5-{(methyldiethylsilyloctyl)hexyl (3- ethylnonyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (2',3',4'-trifluorobiphenyl) (perfluoropyrenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trityl]+[(5-{(t-butyl)isopropylcyclohexylsiloxy}perfluoronaphth-3- yl)bis(perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 bis(1,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [trityl]+[(5-{(t-butyl)octylisopropylsiloxy}perfluoronapth-1-yl)bis(2,3,5- trifluorophenyl) (pentafluoroanthracenylborate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(5-{(t-butyl)octylisopropylsiloxy}- perfluoronapth-1-yl)bis(2,3,5-trifluorophenyl) (pentafluoroanthracenylborate]7 dimethylsilyl
(indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(5-{(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2- dimethyloctyl)siloxy}perfluoroinden-1 -yl) (perfluorophenyl) (perfluoropyrenyl) (perfluorofluorenyl)borate]7 bis(4-triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trity!]+[(5-{(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2- dimethyloctyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)
(tetrafluorofluorenyl)aluminate]7 (4-n-propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(5-{(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2- dimethyloctyl)siloxy}perfIuoronapth-1-yl) (perfluorophenyl) (4,5,7-trifluoronaphthyl) (tetrafluorofluorenyl)aluminate]7 dimethylsily (bisindenyl) zirconium dichloride; [trityl]* [(5- {(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2-dimethyloctyl)siloxy}perfluoronapth-1-yl)
(perfluorophenyl) (4,5,7-trifluoronaphthyl) (tetrafluorofluorenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5- {(triethylsilylethyl) (tri-(isopropyl)silyloctyl)isopropylsiloxy}fluoroinden-1-yl) (perfluorofluorenyl) (perfluorophenyl) (perfluoroanthracenyl)borate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(δ-{(triethylsilylethyl)
(triethylsilylhexyl)isopropylsiloxy}perfluoroinden-1-yl)tris(perfluoroanthracenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [trityl]+[(5- {(triethylsilylethyl) (triethylsilylhexyl)isopropylsiloxy}perfluoroinden-1- yl)tris(perfluoroanthracenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{(triethylsilylethyl)hexylisopropylsiloxy}perfluoronapth-3-yl)
(pentafluoroanthracenyl) (2,3,5-trifluorophenyl) (perfluoroanthracenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [trityl]+[(5-{(triethylsilylmethyl)isopropyl(2,2- dimethyloctyl)siloxy}perfluoronapth-2-yl)bis(perfluorophenyl) (5,6,7,8- tetrafluoronaphthyl)aluminate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(5- {(trimethylsilylethyl) (2,2-dimethyloctyl)isopropylsiloxy}perfluoronapth-3-yl) (4,5,6- trifluoronaphthyl) (perfluoropyrenyl) (perfluorobiphenyl)aluminate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [trityl]+[(5-{(tri-n-propylsilylhexyl) (methyldiethylsilyloctyl)isopropylsiloxy}perfluoronapth-3-yl) (2',3,,4'-trifluorobiphenyf5 (perfluorophenyl) (perfluorobiphenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [trityl]+[(5-{(tri-n-propylsilylhexyl)isopropyl( triethylsilylpropyl)siloxy}perfluoronapth- l-yl)bis(pentafluoroanthracenyl) (perfluoronaphthyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [trityl]+[(5-{(tri-n-propylsilylhexyl)isopropyl( triethylsilylpropyl)siloxy}- perfIuoronapth-1-yl)bis(pentafluoroanthracenyl) (perfluoronaphthyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [trityl]+[(5- {benzylisopropylhexylsiloxy}perfluoroinden-1-yl) (pentafluoroanthracenyl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 diphenylmethylene (indenyl) (2,7-di-t-butyl fluorenyl) hafnium dibenzyl; [trityl]+[(5-{benzylisopropyihexylsiloxy}perfluoroinden-1-yl) (pentafluoroanthracenyl) (perfluorofluorenyl) (4,5,7-trifluoronaphthyl)borate]7 diphenylmethylene(cylcopentadienyl)
(fluorenyl) hafnium dimethyl; [trityl]+[(5-{benzylnonyl(methyldiethylsilyloctyl)siloxy}- fluoronapth-1-yl)tris(perfluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t- butyl fluorenyl) hafnium dimethyl; [trityl]+[(5-{benzylnonyl(methyldiethylsilyloctyl)siloxy}- fluoronapth-1-yl)tris(perfluorophenyl)borate]7 methylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(5-{di-((methyldiethylsilyloctyl))cyclohexylsiloxy}perfluoroinden-1-yl) (perfluorophenyl)
(5,6,7,8-tetrafluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 diphenylmethylene (2,7-di-t-butyl- 5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(5- {hexyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (tetrafluorofluorenyl) (perfluoroanthracenyl)aluminate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(5-{hexylisopropylnonylsiloxy}fluoroinden-2-yl) (perfluorobiphenyl)
(4,5,6,7-tetrafluoronaphthyl) (perfluorophenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(2,7-dimethyl-fluorenyl) (indenyl) hafnium dibenzyl; [trityl]+[(5- {isopropyl(t-butyl)cyclohexylsiloxy}perfluoroinden-1-yl) (perfluoroanthracenyl) (perfluorophenyl) (pentafluoroanthracenyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{isopropyl(t-butyl)nonylsiloxy}perfluoronapth-2-yl)
(pentalfluoropyrenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{isopropyl(tri- (isopropyl)silyloctyl) (3-ethylnonyl)siloxy}perfluoroinden-2-yl) (perfluoronaphthyl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)aluminate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{isopropyl(triethylsilylhexyl) (2,2-dimethyloctyl)siloxy}- perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 di(4- n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (indenyl) hafnium dimethyl; [trityl|+[(5- {isopropylbenzylnonyIsiloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (perfluoroanthracenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl- fluorenyl) hafnium dimethyl; [trityl]+[(5-{isopropylcyclohexyl (3-ethylnonyl)siloxy}~ perfluoroinden-1-yl) (perfluorophenyl) (perfluoroanthracenyl) (perfluoropyrenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [trityl]+[(5- {nonylisopropyl(tri-n-propylsilylhexyl)siloxy}perfluoroinden-2-yl) (2,3,5-trifluorophenyl)
(perfluorophenyl) (2',3',5'-trifluorobiphenyl)borate]7 dimethylsilyl bis(methylindenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-1-yl) (pentafluoroanthracenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}- perfluoroinden-1-yl) (perfluorophenyl) (perfluoroanthracenyl) (2',3',4'- trifluorobiphenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (2',3',4'-trifluorobiphenyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(δ-{tri-(isoρropyl)siloxy}perfIuoroinden-2-yl) (2,3,4-trifluorophenyl) (perfluoroanthracenyl) (pentalfluoropyrenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t- butyl-δ-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}- perfluoroinden-2-yl) (perfluorophenyl) (2', 3', 5'-trifluorobiphenyl) (2,3,4-trifluorophenyl)borate]7 dimethylsily (bisindenyl) zirconium dichloride; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoroinden- 2-yl)bis(perfluorobiphenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoroinden-2-yl)bis(perfluorophenyl)
(perfluorobiphenyl)borate]7 bis(1,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [trityl]+[(δ-{tri-(isopropyl)siloxy}perfluoroinden-2-yl)bis(perfluoropyrenyl) (perfluorobiphenylborate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoroinden- 2-yl)bis(perfluoropyrenyl) (perfluorobiphenylborate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronaphth-3-yl) (4,5,6-trifluoronaphthyl) (5,6,7,8-tetrafluoronaphthyl) (perfluoroanthracenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (perfluorobiphenyl) (2,3,6- trifluorophenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)methylene (fluorenyl)
(cyclopentadienyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (perfluorophenyl) (perfluorobiphenyl) (2,3,6-trifluorophenyl)aluminate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronapth- l-yl)bis(perfluorophenyl) (pentafluoroanthracenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-2-yl) (2',3',5'-trifluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl) (2,3,4-trifluorophenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (perfluorofluorenyl) (2',3',5'-trifluorobiphenyl) (perfluoropyrenyI)borate]7 methylene (2,7-di-t- butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-2- yl) (perfluorophenyl) (perfluorobiphenyl) (2,3,4-trifluorophenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; (trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-2-yl)bis(perfluorophenyl) (perfluorofluorenylborate]7 diphenylmethylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (pentafluoroanthracenyl) (perfluoropyrenyl) (perfluorobiphenyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (perfluoronaphthyl) (4,5,6-trifluoronaphthyl) (2',3',5'- trifluorobiphenyl)aluminate]7 (4-n-propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(5-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluoronaphthyl) (perfluoroanthracenyl) (perfluorophenyl)aluminate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(5-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (perfluoronaphthyl) (perfluoroanthracenyl)
(ρerfluorophenyl)aluminate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [trityl]+[(6-{ (3-ethylnonyl)benzylisopropylsiloxy}perfluoroanthracen-1-yl) (2', 3',4'-trifluorobiphenyl) (perfluorophenyl) (2,3,5-trifluorophenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(6-{ (3-ethylnonyl)isopropyl(tri-n-propylsilylhexyl)siloxy}perfluoroanthracen-2-yl) (4,5,7- trifluoronaphthyl) (perfluorobiphenyl) (perfluorofluorenyl)aluminate]7 diphenylmethylene (2,7- di-t-butyl-5-methylfluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{( triethylsilylpropyl)benzylisopropylsiloxy}perfluoroanthracen-1-yl)bis(perfluorophenyl) (perfluorobiphenylborate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trityl]+[(6-{(2,2-dimethyloctyl)isopropyl(triethylsilylethyI)siloxy}- perfluoroanthracen-1-yl)bis(perfluoroanthracenyl) (4,δ,7-trifluoronaphthylborate]7 diphenylmethyl (cylcopentadienyl) (2,7-dimethylfluorenyl) hafnium dimethyl; [trityl]+[(6- {(methyldiethylsilyloctyl) ( triethylsilylpropyl)isopropylsiloxy}fluoroanthracen-1 - yl)bis(perfluoroanthracenyl) (perfluorophenylborate]7 bis(4- triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(6-{(tri- (isopropyl)silyloctyl)isopropyl(methyldiethylsilyloctyl)siloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(6-
{(trimethylsilylethyl)isopropyl( triethylsilylpropyl)siloxy}perfluorofluoren-1-yl) (2,3,6- trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 di(4-n-propylphenyl)methylene (2,7-di-t-butyl-5-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6- {(trimethylsilylethyl)isopropyl( triethylsilylpropyl)siloxy}perfluorofluoren-1 -yl) (2,3,6- trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [trityl]+[(6-{(trimethylsilylethyl)isopropyl( triethylsilylpropyl)siloxy}perf!uorofluoren-1 -yl) (2,3,6-trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl ; [trityl]+[(6-{(trimethylsilylethyl)isopropyl(trimethylsilylethyl)siloxy}fluoronapth-2-yl)
(perfluoroanthracenyl) (perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)aluminate]7 (4-n- propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trityl]+[(6- {(trimethylsilylethyl)isopropyl(trimethylsilylethyl)siloxy}fluoronapth-2-yl) (perfluoroanthracenyl) (perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{(tri-n-propylsilylhexyl)isopropyl(tri-
(isopropyl)silyloctyl)siloxy}perfluoroanthracen-1-yl) (2,3,4-trifluorophenyl) (perfluorobiphenyl) (perfluoronaphthyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [trityl]+[(6-{benzylisopropyl(triethylsilylmethyl)siloxy}perfluoronapth-1-y|) (perfluorophenyl) (tetrafluorofluorenyl) (2,3,5-trifluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (adamantylamido) titanium dichloride; [trityl]+[(6-
{cyclohexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluoroanthracen-2-yl)bis(perfluorophenyl) (2,,3',4'-trifluorobiphenyl)aluminate]7 (4-n-propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(6-{cyclohexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}- perfluoroanthracen-2-yl)bis(perfluorophenyl) (2',3,,4'-trifluorobiphenyl)aluminate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{di-((2,2- dimethyloctyl))isopropylsiloxy}perfluorofluoren-2-yl) (tetrafluorofluorenyl) (2,3,6- trifluorophenyl) (perfluoronaphthyl)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(6-{di-((methyldiethylsilyloctyl)) (triethylsilylmethyl)siloxy}perfluoroanthraceni1-yl) (pentalfluoropyrenyl) (perfluorofluorenyl) (perfluoroanthracenyl)borate]7 (4-n-butylphenyl) (4- t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{di-((methyldiethylsilyloctyl)) (triethylsilylmethyl)siloxy}perfluoroanthracen-1-yl) (pentalfluoropyrenyl) (perfluorofluorenyl) (perfluoroanthracenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[trityl]+[(6-{di-((tri-(isopropyl)silyloctyl))isopropylsiloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (2',3',4'-trifluorobiphenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(6-{di-(hexyl)isopropylsiloxy}perfluorofluoren-1-yl) (2,3,6- trifluorophenyl) (2',3',4'-trifluorobiphenyl) (pentafluoroanthracenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl;
[trityl]+[(6-{di-(hexyl)isopropylsiloxy}perfluorofluoren-1-yl) (2,3,6-trifluorophenyl) (2',3',4'- trifluorobiphenyl) (pentafluoroanthracenyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(6-{di-(hexyl)isopropylsiloxy}perfluorofluoren-1-yl) (2,3,6- trifluorophenyl) (2',3',4'-trifluorobiphenyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(6-
{hexyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoronaphth-2-yl)bis(perfluorobiphenyl) (perfluorophenylaluminate]7 silacyclobutyl(tetramethylcyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(6-{hexylisopropyl( triethylsilylpropyl)siloxy}perfluoroanthracen-1-yl) (perfluoroanthracenyl) (2,3,4-trifluorophenyl) (perfluoropyrenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl;
[trityl]+[(6-{hexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluoroanthracen-2-yl) (perfluorophenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trityl]+[(6- {hexylisopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluoroanthracen-2-yl) (perfluorophenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 pentamethylcyclopentadienyl titanium trimethyl; [trityl]+[(6-{isopropyl(t-butyl)isopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6- {isopropyl(t-butyl)isopropylsiloxy}perfluoroanthracen-1-yl) (perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl)aluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [trityl]+[(6-{isopropyl(trimethylsilylethyl) (2,2-dimethyloctyl)siloxy}- perfluoroanthracen-2-yl)bis(perfluoroanthracenyl) (pentafluoroanthracenyl)borate]7,di(4-n- butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{isopropyl(tri-n-propylsilylhexyl) ( triethylsilylpropyl)siloxy}perfluorofluoren-1-yl) (2,3,6-trifluorophenyl) (perfluorobiphenyl) (2,3,4-trifluorophenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{isopropyl(tri-n-propylsilylhexyl) ( triethylsilylpropyl)siloxy}perfluoronapth-1-yl) (perfluoropyrenyl) (pentalfluoropyrenyl)
(perfluorobiphenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t- butyl-fluorenyl)hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluorofluorenyl) (2,3,6-trifluorophenyl)aluminate]7 (4-n- propylphenyl) (4-methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(6- {tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (pentafluoroanthracenyl) (2,3,δ-trifluorophenyl)
(perfluoroanthracenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl] [(6-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl) (pentafluoroanthracenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}- perfluoroanthracen-1-yl) (perfluorobiphenyl) (perfluoronaphthyl) (perfluorophenyl)borate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}- perfluoroanthracen-2-yl) (2',3',4'-trifluorobiphenyl) (perfluoroanthracenyl) (4,5,7- trifluoronaphthyl)aluminate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2-yl) (2',3',4'-trifluorobiphenyl) (perfluoroanthracenyl) (4,5,7-trifluoronaphthyl)aluminate]7 dimethylsilylbis(2- methylbenzindenyl) zirconium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroanthracen-2- yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)aluminate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(6-{tri- (isopropyl)siloxy}perfluorofluoren-1-yl) (2,3,5-trifluorophenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl;
[trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluorophenyl) (2,3,5-trifluorophenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1- yl)tris(perfluorophenyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl)tris(perfluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dimethyl; [trityl]+[(6-{tri- (isopropyl)siloxy}perfluorofIuoren-2-yl) (perfluoroanthracenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl- fluorenyl) (indenyl) hafnium dibenzyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluoroanthracenyl) (perfluoropyrenyl) (perfluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren- 2-yl) (perfluorobiphenyl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl)borate]7 (4- alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl;
[trityl] [(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorobiphenyl) (perfluorofluorenyl) (4,5,6,7-tetrafluoronaphthyl)boratej7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyI)siloxy}perfluorofluoren-2-yl) (perfluorobiphenyl) (perfluorophenyl) (perfluorofluorenyl)aluminate]7 (4-n-butylphenyi) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(6-{tri-
(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluoronaphthyl) (2,3,6-trifluorophenyl) (perfluorophenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (perfluorobiphenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 dimethylsilyl bis(2-methyl-indenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (perfluorobiphenyl)
(2',3',5'-trifluorobiphenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl)bis(perfIuorophenyl) (perfluoropyrenylaluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (4,δ,6,7-tetrafluoronaphthyl) (2',3',δ'- trifluorobiphenyl) (perfluorobiphenyl)borate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2, 7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (4,δ,6-trifluoronaphthyl) (4,5,7- trifluoronaphthyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (pentafluoroanthracenyl) (4,5,6- trifluoronaphthyl) (perfluorophenyl)borate]7 (tetramethyl-cyclopentadienyl) (n- propylcyclopentadienyl) zirconium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoroinden-2- yl) (pentalfluoropyrenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluoropyrenyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}- perfluoroinden-2-yl) (pentalfluoropyrenyl) (perfluorophenyl) (perfluorofluorenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(6-{tri-
(isopropyl)siloxy}perfluoronapth-1-yl)bis(tetrafluorofluorenyl) (perfluorobiphenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(6-{tri-(isopropy|)siloxy}- perfluoronapth-l-yl)bis(tetrafluorofluorenyi) (perfluorobiphenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-2-yl) (2,3,4- trifluorophenyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siIoxy}- perfluoronapth-2-yl)bis(perfluorophenyl) (perfluorobiphenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (5,6,7,8- tetrafluoronaphthyl) (perfluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(6-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (tetrafluorofluorenyl) (perfluorophenyl) (perfluorobiphenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [trityl]+[(7-{
(3-ethylnonyl) ( triethylsilylpropyl)isopropyIsiloxy}perfluorofluoren-1-yl) (perfluorofluorenyl) (pentafluoroanthracenyl) (2,3,6-trifluorophenyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{ (3-ethylnonyl) (t-butyl) (triethylsilylethyl)siloxy}- perfluoronapth-3-yl) (tetrafluorofluorenyl) (2',3',5'-trifluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{ (3-ethylnonyl)
(tri-(isopropyl)silyloctyl)isopropylsiloxy}perfluorofluoren-2-yl) (2,3,5-trifluorophenyl) (2',3',4'- trifluorobiphenyl) (perfluorobiphenyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [trityl]+[(7-{( triethylsilylpropyl) (triethylsilylmethyl) (3-ethylnonyl)siloxy}- perfluoropyren-1-yl)tris(perfluorophenyl)borate]7 bis(1 ,3-dibutyl-methyl-cyclopentadienyl) zirconium dimethyl; [trityl]+[(7-{(2,2-dimethyloctyl) (triethylsilylethyl)isopropylsiloxy}- perfluorofluoren-2-yl) (pentalfluoropyrenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7- {(methyldiethylsilyloctyl)isopropylnonylsiloxy}perfluoropyren-2-yl) (pentalfluoropyrenyl) (perfluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di-t- butyl-fluorenyl) hafnium dimethyl; [trityl]+[(7-{(methyldiethylsilyloctyl)isopropylnonylsiloxy}- perfluoropyren-2-yl) (pentalfluoropyrenyl) (perfluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{(t-butyl) (methyldiethylsilyloctyl) (tri-n-propylsilylhexyl)siloxy}perfluoroinden-2-yl) (4,5,7- trifluoronaphthyl) (perfluorophenyl) (perfluorofluorenyl)aluminate]7 (tetramethyl-cyclopentadienyl) (n-propylcyclopentadienyl) zirconium dimethyl; [trityl] +[(7-{(tri-
(isopropyl)silyloctyl) (3-ethylnonyl) (2,2-dimethyloctyl)siloxy}perfluoronapth-2-yl) (2,3,5- trifluorophenyl) (2',3',5'-trifluorobiphenyl) (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl bis(2- methyl-4-phenyl-indenyl) hafnium dimethyl; [trityl]+[(7-{(tri-(isopropyl)silyloctyl) (3-ethylnonyl) (2,2-dimethyloctyl)siloxy}perfluoronapth-2-yl) (2,3,δ-trifluorophenyl) (2',3',δ'-trifluorobiphenyl) . (4,5,6-trifluoronaphthyl)borate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(7-{(triethylsilylethyl) (methyldiethylsilyloctyl)nonylsiloxy}perfluoronapth-1-yl) (perfluoropyrenyl) (perfluoronaphthyl) (perfluoroanthracenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [trityl]+[(7-
{(triethylsilylethyl)isopropylbenzylsiloxy}perfluoroanthracen-1-yl) (perfluoropyrenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7- {(triethylsilylethyl)isopropylbenzylsiloxy}perfluoroanthracen-1-yl) (perfluoropyrenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl;
[trityl]+[(7-{(triethylsilylethyl)isopropylbenzylsiloxy}perfluoroanthracen-1-yl) (perfluoropyrenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 diphenylmethyiene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{(triethylsilylmethyl)isopropyl(2,2- dimethyloctyl)siloxy}perfluoropyren-2-yl) (2,,3',4'-trifluorobiphenyl) (perfluoronaphthyl) (4,5,6,7- tetrafluoronaphthyl)aluminate]7 dimethylsilyl bisindenyl hafnium dimethyl; [trityl]+[(7-
{(trimethylsilylethyl) (t-butyl) (triethylsilylethyl)siloxy}fluoropyren-1 -yl) (2,3,5-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)aluminate]7 dimethylsilyl bis(phenylmethylindenyl) hafnium dimethyl; [trityl]+[(7-{(trimethylsilylethyl) (t-butyl) (triethylsilylethyl)siloxy}fluoropyren- 1-yl) (2,3,6-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)aluminate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) zirconium dimethyl; [trityl]+[(7-{(trimethylsilylethyl) (t-butyl)
(triethylsilylethyl)siloxy}fluoropyren-1 -yl) (2,3,5-trifluorophenyl) (perfluoropyrenyl) (perfluorophenyl)aluminate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(7-{(tri-n-propylsilylhexyl)isopropyl(tri-(isopropyl)silyloctyl)siloxy}perfluoronapth-3-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 bis(4- • triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(7-{(tri-n- propylsilylhexyl)isopropylnonylsiloxy}perfluoronapth-1-yl) (4,5,7-trifluoronaphthyl) (pentalfluoropyrenyl) (perfluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{benzylisopropylcyclohexylsiloxy}perfluoronapth-1-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluorofluorenyl) (perfluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl] [(7-{benzylisopropylcyclohexylsiloxy}- perfluoronapth-1-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluorofluorenyl) (perfluorophenyl)borate]" / dimethylsilylbis(tetrahydroindenyl) zirconium dichloride; [trityl]+[(7- {benzylisopropylnonylsiloxy}perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (perfluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{benzylisopropylnonylsiloxy}perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (perfluoronaphthyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (indenyl) hafnium dimethyl; [trityl]* [(7- {benzylisopropylnonylsiloxy}perfluorofluoren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (perfluoronaphthyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(7-{benzylnonyl(methyldiethylsilyloctyl)siloxy}perfluoronapth-2- yl)bis(perfluorophenyl) (2',3',4,-trifluorobiphenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(7-{di-((methyldiethylsilyloctyl))isopropylsiloxy}- perfluoronapth-2-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl)borate]~ / (4-n-butylphenyl) (4-t-butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{di-((tri-(isopropyl)silyloctyl))isopropylsiloxy}perfluoronapth-3- yl)bis(perfluoropyrenyl) (2,3,6-trifluorophenyl)aluminate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{di-((tri- (isopropyl)silyloctyl))isopropylsiloxy}perfluoronapth-3-yl)bis(perfluoropyrenyl) (2,3,6- trifluorophenyl)aluminate]7 bis(4-triethylsilylphenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(7-{di-((tri-(isopropyl)silyloctyl))isopropylsiloxy}- perfluoronapth-3-yl)bis(perfluoropyrenyl) (2,3,6-trifluorophenyl)aluminate]7 di(4-n- butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7-{di- ((triethylsilylhexyl))isopropylsiloxy}perfluoroinden-2-yl) (perfluorobiphenyl) (perfluorophenyl) (^.S'.δ'-trifluorobipheny boratefV dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [trityl]+[(7-{di-((triethylsilylhexyl))isopropylsiloxy}perfluoronapth-2-yl) (perfluorofluorenyl) (perfluorophenyl) (perfluoropyrenyl)borate]7 dinapthylmethylene
(cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{di-((tri-n-propylsilylhexyl)) (triethylsilylethyl)siloxy}perfluoronapth-2-yl)bis(perfluorobiphenyl) (perfluoroanthracenylborate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [trityl]+[(7-{di-(isopropyl) (triethylsilylhexyl)siloxy}fluoropyren-2-yl) (2,3,4-trifluorophenyl) (perfluorofluorenyl) (2,3,5-trifluorophenyl)borate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{di-(isopropyl) (triethylsilylhexyl)siloxy}fluoropyren-2-yl) (2,3,4-trifluorophenyl) (perfluorofluorenyl) (2,3,5- trifluorophenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{ethyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoronaphth-3-yl) (perfluoroanthracenyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-
{ethyl(methyldiethylsilyloctyl)isopropylsiloxy}perfluoronaphth-3-yl) (perfluoroanthracenyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 diphenylmethyl (fluorenyl)
(cyclopentadienyl) zirconium dimethyl; [trityl]+[(7-{hexyl(tri-n-propylsilylhexyl)isopropylsiloxy}- perfluoroinden-2-yl) (perfluorofluorenyl) (Z.S'^'-trifluorobiphenyl) (perfluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [trityl]+[(7- {isopropyl (3-ethylnonyl)isopropylsiloxy}perfluorofluoren-2-yl) (tetrafluorofluorenyl) (2',3',5'- trifluorobiphenyl) (4,5,6, 7-tetrafluoronaphthyl)borate]7 diphenylmethylene (cyclopentadienyl)
(2,7-di-t-butyl fluorenyl) hafnium dimethyl; [trityl]+[(7-{isopropyl(t-butyl) (triethylsilylmethyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (perfluoropyrenyl) (2,3,5- trifluorophenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl-fluorenyl) (cyclopentadienyl) hafnium dimethyl ; [trityl]+[(7-{isopropyl(t-butyl) (triethylsilylmethyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl)
(perfluoropyrenyl) (2,3,5-trifluorophenyl)borate]7 bis(4-
(triethylsilyl)phenyl)methylene(cyclopentadienyl) (2, 7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(7-{isopropyl(t-butyl) (triethylsilylmethyl)siloxy}perfluoronapth-3-yl) (perfluoroanthracenyl) (perfluorophenyl) (pentafluoroanthracenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [trityl]+[(7-
{isopropyl(t-butyl)nonylsiloxy}perfluoronapth-2-yl)bis(perfluorophenyl) (4,5,6- trifluoronaphthyl)borate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{isopropyl(triethylsilylethyl)cyclohexylsiloxy}- perfluoroinden-2-yl) (2,3,5-trifluorophenyl) (perfluorobiphenyl) (pentalfluoropyrenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-
{isopropyl(triethylsilylhexyl) (triethylsilylmethyl)siloxy}perfluorofluoren-1-yl) (5,6,7,8- tetrafluoronaphthyl) (4,5,7-trifluoronaphthyl) (perfluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-di-t-butyl fluorenyl) hafnium dimethyl ; [trityl]+[(7-{isopropyl(trimethylsilylethyl)isopropylsiloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7
(pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trityl]+[(7- {isopropyl(trimethylsilylethyl)isopropylsiloxy}perfluoronapth-1-yl) (perfluorobiphenyl) (perfluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dipheηylmethylene(cylcopentadιenyl) (2,7- methyl-fluorenyl) hafnium dimethyl; [trityl]+[(7-{isopropyl(tri-n-propylsilylhexyl) (triethylsilylhexyl)siloxy}perfluoroinden-2-yl) (2,3,δ-trifluorophenyl) (perfluoropyrenyl) (pentafluoroanthracenyl)aluminate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{isopropylcyclohexylisopropylsiloxy}- perfluoronapth-2-yl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl) (perfluorofluorenyl)borate]7 dibutylsilyl (fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{isopropylhexyl(t- butyl)siloxy}perfluoropyren-2-yl)bis(perfluorofluorenyl) (2',3',5'-trifluorobiphenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(7-{isopropylnonyl( triethylsilylpropyl)siloxy}- fluorofluoren-2-yl) (2,3,6-trifluorophenyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(7-(isopropyloctyl(methyldiethylsilyloctyl)siloxy}- perfluoropyren-1-yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluorobiphenyl)borate]7 (4-n- propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trityi]+[(7- {isopropyloctyl(triethylsilylethyl)siloxy}perfluoronapth-2-yl) (perfluorofluorenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{nonyl( triethylsilylpropyl)isopropylsiloxy}- perfluoropyren-2-yl) (4,5,7-trifluoronaphthyl) (perfluoropyrenyl) (perfluorophenyl)aluminate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{octylisopropyl(triethylsilylethyl)siloxy}perfIuoronapth-1-yl) (pentafluoroanthracenyl) (2,,3',5,-trifluorobiphenyl) (4,δ,6-trifluoronaphthyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [trityl]+[(7-{tri-
(isopropyl)siloxy}perfluoroanthracen-1-yl) (5,6,7,8-tetrafluoronaphthyl) (2,3,4-trifluorophenyl) (perfluorophenyl)borate]7 dimethylsilyl (indenyl) (fluorenyl) hafnium dihydride; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoroanthracen-1 -yl) (pentafluoroanthracenyl) (perfluorobiphenyl) (perfluorophenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoroanthracen-1-yl)
(perfluorophenyl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl)aluminate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}- perfluoroanthracen-1-yl)bis(2',3,,5,-trifluorobiphenyl) (2',3',4'-trifluorobiphenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (dodecylamido) hafnium dihydride; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoroanthracen-1-yl)bis(2',3,,5'-trifluorobiphenyl) (2',3',4'- trifluorobiphenyl)borate]7 methylene (indenyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trity l]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1 -y I) (perfluorofluoren l) (perfluorophenyl) (5,6,7,8-tetrafluoronaphthyl)aluminate]7 bis(4- (triethylsilyl)phenyl)methylene(cyclopentadienyl) (2,7-di-t-butyl-fluorenyl)hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (perfluorophenyl) (perfluoropyrenyl) (4,5,6-trifluoronaphthyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl) (tetrafluorofluorenyl) (2',3',4'-trifluorobiphenyl) (perfluoropyrenyl)aluminate]7 di(4-n- butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluorofluoren-1-yl)bis(perfiuorobiphenyi) (5,6,7,8- tetrafluoronaphthyl)borate]7 dimethylsilyl bis(2-methyl-4-naphth-2-yl-indenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyciopentadienyl)
(fluorenyl)hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1- yl)bis(perfluorobiphenyl) (perfluorophenyl)borate]7 diphenylmethylene (cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1- yl)bis(perfluorophenyl) (perfluorofluorenyl)borate]7 dimethylsilyl bisindenyl hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-1-yl)bis(perfluorophenyl)
(tetrafluorofluorenyl)borate]7 (4-n-butylphenyl) (4-t-butyiphenyl)methylene (2,7-di-t-butyl- fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl] [(7-{tri-(isopropyl)siloxy}- perfluorofluoren-l-yl)bis(perfluorophenyl) (tetrafluorofluorenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluorofluoren-2-yl) (2,,3',5'-trifluorobiphenyl) (4,5,6,7-tetrafluoronaphthyl)
(perfluorofluorenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl- fluorenyl) (indenyl) hafnium dibenzyl; [trityi]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (2,3,6-trifluorophenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 diphenylmethylene(cylcopentadienyl) (2,7-di-t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(7- {tri-(isopropyl)siloxy}perfluorofluoren-2-yl) (perfluorophenyl) (2,3,4-trifluorophenyl)
(perfluorobiphenyl)aluminate]7 di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluorofluoren-2- yl)bis(perfluoronaphthyl) (perfluoropyrenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (adamantyl-1 -amino) titanium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluorofluoren-2-yl)bis(perfluorophenyl) (2,,3',5'-trifluorobiphenyl)borate]7 dimethylsilylbis(2-methylbenzindenyl) zirconium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}- perfluoroinden-2-yl) (4,5,7-trifluoronaphthyl) (2,3,4-trifluorophenyl) (perfluorobipheptyl)borate]~ / bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yI) (perfluorofluorenyl) (perfluorobiphenyl) (4,5,7-trifluoronaphthyl)borate]7 di(4-n-butylphenyl) methylene (fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoroinden-2-yl) (perfluorophenyl) (perfluorobiphenyl) (tetrafluorofluorenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1-yl) (4,5,6,7- tetrafluoronaphthyl) (perfluorofluorenyl) (2,3,6-trifluorophenyl)borate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl;
[trityl]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1 -yl) (pentalfluoropyrenyl) (perfluorophenyl) (perfluorofluorenyl)borate]7 bis(4-(triethylsilyl)phenyl)methylene(cyclopentadienyl) (fluorenyl)hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}.perfluoronapth-1-yl) (perfluorofluorenyl) (2,3,6-trifluorophenyl) (4,5,7-trifluoronaphthyl)borate]7 dimethylsilyl bis(2- methyl-4-phenyl-indenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoronapth-1- yl)bis(perfluoropyrenyl) (2,3,4-trifluorophenylborate]7 di(4-n-butylphenyl)methylene (2,7-di-t- butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}- perfluoronapth-l-yl)bis(perfluoropyrenyl) (2,3,4-trifluorophenylborate]7 diphenylmethylene (2,7-di-n-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}- perfluoronapth-2-yl) (2,3,4-trifluorophenyl) (perfluorophenyl) (2,3,6-trifluorophenyl)borate]7 dimethylsilyl (tetramethylcyclopentadienyl) (t-butylamino) titanium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-2-yl) (2,3,4-trifluorophenyl) (perfluorophenyl) (2,3,6- trifluorophenyl)borate]7 pentamethyl cyclopentadienyl tribenzyl titanium; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (perfluoropyrenyl) (4,5,6- trifluoronaphthyl)borate]7 methylene (2,7-di-t-butyl fluorenyl) (fluorenyl) hafnium dimethyl;
[tritylf[(7-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorofluorenyl) (2',3',5'- trifluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl)borate]7 di(4-n-butylphenyl)methylene (2,7- dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [trityl] [(7-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluorofluorenyl) (2',3',δ'-trifluorobiphenyl) (5,6,7,8- tetrafluoronaphthyl)borate]7 dimethylsilyl bis(2-propyl-indenyl) hafnium dimethyl; [trityl [(7-
{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (4,5,6-trifluoronaphthyl) (perfluoroanthracenyl) (perfluorofluorenyl)borate]7 diphenylmethyl (fluorenyl) (cyclopentadienyl) hafnium^limethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorobiphenyl) (perfluoropyrenyl)borate]7 diphenylmethyl (cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (pentalfluoropyrenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 diphenylmethyl (cylcopentadienyl) (2,7-di- t-butyl-fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl)
(pentalfluoropyrenyl) (perfluoroanthracenyl) (perfluorobiphenyl)borate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}- perfluoropyren-^l-yl) (perfluoroanthracenyl) (perfluorophenyl) (2',3',5'-trifluorobiphenyl)borate / di(4-n-butylphenyl)methylene (2,7-di-t-butyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (perfluorophenyl) (5,6,7,8- tetrafluoronaphthyl) (perfluoropyrenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1-yl) (perfluoropyrenyl) (4,5,7-trifluoronaphthyl) (2,3,5-trifluorophenyl)borate]7 dinapthylmethylene (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 (4-n-propylphenyl) (4- methylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsity-bisindenyl hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 isopropyl (cyclopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)tris(perfluorophenyl)borate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene (2,7-di-t-butyl- fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-1- yl)tris(perfluorophenyl)borate]7 bis(trimethylsilyl) titanium dimethyl; [trityl]+[(7-{tri- (isopropyl)siloxy}perfluoropyren-1-yl)tris(perfluorophenyl)borate]7 dimethylsilyl(tetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [trityl]+[(7-{tri-
(isopropyl)siloxy}perfluoropyren-2-yl) (perfluorophenyl) (perfluoropyrenyl) (2,3,6- trifluorophenyl)borate]7 dimethylsilylttetramethylcyclopentadienyl) (tert-butylamido) titanium dichloride; [trityl]+[(7-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)bis(perfluorophenyl) (perfluorobiphenyl)aluminate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(8- {(methyldiethylsilyloctyl)hexyl (3-ethylnonyl)siloxy}fluoronapth-3-yl) (perfluorobiphenyl)
(5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)aluminate]7 diphenylmethylene(cylcopentadienyl) (2,7-methyl-fluorenyl) hafnium dimethyl; [trityl]+[(8- {(triethylsilylethyl)isopropylbenzylsiloxy}perfluoropyren-2-yl)bis(tetrafluorofluorenyl) (4,5,6- trifluoronaphthyl)borate]7 diphenylmethylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(8-{di-(isopropyl) ( triethylsilylpropyl)siloxy}perfluoropyren-2-yl) (perfluorophenyl) (tetrafluorofluorenyl) (perfluoropyrenyl)borate]7 pentamethyl cyclopentadienyl titanium isopropoxide; [trityl]+[(8-{isopropyl(2,2-dimethyloctyl)isop'ropylsiloxy}perfluoronapth-3- yl)tris(perfluorophenyl)aluminate]7 pentamethylcyclopentadienyl titanium trimethyl; [trityl]+[(8-{isopropyl(triethylsilylhexyl) (2,2-dimethyloctyl)siIoxy}perfluoropyren-2-yl) (perfluorofluorenyl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)aluminate]7 (4-n-propylphenyl) (4-isopropylphenyl)silylenebis(fluorenyl) hafnium di-t-butyl; [trityl] [(8-{isopropy!(tri-n- propylsilylhexyl) (triethylsilylhexyl)siloxy}perfluoronapth-3-yl) (2',3',4'-trifluorobiphenyl)
(5,6,7,8-tetrafluoronaphthyl) (perfluoropyrenyl)borate]7 di(4-n-propylphenyl)methylene (2,7- di-t-butyl-δ-methylfluorenyl) (fluorenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (4,δ,6,7-tetrafluoronaphthyl) (perfluorobiphenyl) (2,3,6- trifluorophenyl)aluminate]7 (pentamethylcyclopentadienyl) (cyclopentadienyl)zirconium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (4,5,6,7-tetrafluoronaphthyl)
(perfluorobiphenyl) (2,3,6-trifluorophenyl)aluminate]7 dimethylsilyl(tetramethylcyclopentadienyl) (t-butylamido) zirconium dimethyl; [trityl]+[(8-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (4,5,6,7-tetrafluoronaphthyl) (perfluorobiphenyl) (2,3,6- trifluorophenyl)aluminate]7 methylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(8-{tri- (isopropyl)siloxy}perfluoronapth-3-yl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)
(perfluorofluorenyl)borate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluorophenyl)borate]7 diphenylmethylene
(cyclopentadienyl) (2,7-dimethyl fluorenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}- perfluoronapth-3-yl) (perfluorobiphenyl) (perfluorofluorenyl) (2',3',5'- trifluorobiphenyl)aluminate]7 (4-n-butylphenyl) (4-t-butylphenyl)methylene(2,7-dimethyl- fluorenyl) (indenyl) hafnium dibenzyl; [trityl]+[(8-{tri-(isopropyl)siloxy}perfluoronapth-3-yl) (perfluorobiphenyl) (perfluorofluorenyl) (2',3',5'-trifluorobiphenyl)aluminate]7 methylphenylmethylene bis(fluorenyl) hafnium dimethyl; [trityl]+[(8~{tri-(isopropyl)siloxy}- perfluoronapth-3-yl)bis(5,6,7,8-tetrafluoronaphthyl) (2,3,4-trifluorophenyl)borate]7 dimethylsilyl bis(naphthylmethylindenyl) hafnium dimethyl; [tritylf[(8-{tri-(isopropyl)siloxy}- perfluoropyren-2-yl) (2,3,6-trifluorophenyl) (perfluoroanthracenyl) (pentalfluoropyrenyl)borate]" / dimethylsilyl bis(methylindenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}- perfluoropyren-2-yl) (4,5,6-trifluoronaphthyl) (perfluorophenyl)
(pentafluoroanthracenyI)borate]7 dimethylsily-bisindenyl hafnium dimethyl; [trityl]+[(8-{tri- (isopropyl)siloxy}perfluoropyren-2-yl) (perfluorobiphenyl) (5,6,7,8-tetrafluoronaphthyl) (perfluoropyrenyl)aluminate]7 (4-alkylphenyl) (4-t-butylphenyl)methylene(cylcopentadienyl) (fluorenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)
(perfluorobiphenyl) (perfluoronaphthyl) (pentalfluoropyrenyl)borate]7 (4-n-butylphenyl) (4-t- butylphenyl)methylene(fluorenyl) (indenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}- perfluoropyren-2-yl) (perfluorobiphenyl) (perfluoronaphthyl) (pentalfluoropyrenyl)borate]7 dimethylsilyl bis(indenyl) hafnium dimethyl; [trityl]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2- yl)bis(pentafluoroanthracenyl) (perfluorofluorenylborate]7 di(4-n-butylphenyl)methylene (2,7- dimethyl fluorenyl) (cyclopentadienyl) hafnium dibenzyl; [trityl]+[(8-{tri-(isopropyl)siloxy}- perfluoropyren-2-yl)bis(pentafluoroanthracenyl) (perfluorofluorenylborate]7 di(4-n- butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl; [trityl] [(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)bis(pentafIuoroanthracenyl) (perfluorofluorenylboratefY dimethylsilyl bis(2-methyl-4-phenyl-indenyl) hafnium dimethyl;
[trityl]+[(8-{tri-(isopropyl)siloxy}perfluoropyren-2-yl)bis(perfluorobiphenyl) (perfluorofluorenylborate]7 di(4-n-butylphenyl)methylene (2,7-dimethyl fluorenyl) (cyclopentadienyl) hafnium dimethyl
EXAMPLES
The following examples illustrate the foregoing discussion. All parts, proportions and percentages are by weight unless otherwise indicated. All examples were carried out in dry, oxygen-free environments and solvents. Although the examples may be directed to certain invention embodiments, they do not limit the invention in any specific respect. In these examples certain abbreviations are used. These include standard chemical abbreviations for the elements and certain commonly accepted abbreviations, such as : Me = methyl, Et = ethyl, n-Pr = normal-propyl, t-Bu = tertiary-butyl, Ph = phenyl, pfp = pentafluorophenyl, Cp = cyclopentadienyl, Ind = indenyl, Flu = fluorenyl, TMS = trimethylsilyl, TES = triethylsilyl and THF (or thf) = tetrahydrofuran.
All molecular weights are weight average unless otherwise noted. Molecular weights (weight average molecular weight (Mw) and number average molecular weight (Mn) were measured by Gel Permeation Chromatography (GPC) using a Wa- ters 150 Gel Permeation Chromatograph equipped with a differential refractive index (DRI) and low angle light scattering (LS) detectors and were calibrated using polystyrene standards. Samples were run in 1,2,4-trichlorobenzene (135°C) using three Polymer Laboratories PC Gel mixed B columns in series. This general technique is discussed in "Liquid Chromatography of Polymers and Related Materials III"' J.
Cazes Ed., Marcel Decker, 1981, page 207. No corrections for column spreading were employed; however, data on generally accepted standards, e.g. National Bureau of Standards Polyethylene 1475, demonstrated a precision with 0.2 units for Mw/Mn as calculated from elution times. Catalyst Preparation
Example 1.
Synthesis of HC6F OSi(iPr)3: One equivalent of potassium hydride suspended in THF was added to a THF solution of 2,3,5,6-tetrafluorophenol (5 grams). Gas evolved. After stirring for 1 hour, one equivalent of triisopropylchlorosilane was added. Then, the reaction was stirred for 16 hours. After this, the solvent was replaced with pentane. Next, the resulting precipitate was filtered off. The product was purified by column chromatography (silica gel, hexanes): yield = 6.864 grams, 71 %. 1H NMR (CDC13, 25° C): δ 6.65 (m, IH), 1.29 (hp, 3H), 1.09 (d, 18H). 19F NMR (CDCI3, 25° C): δ -142.4 (m, 2F), -159.1 (m, 2F). Example 2.
Synthesis of [Li(Et2O)2.5][B(C6F4OSi(iPr)3)4]: One equivalent of BuLi (1.6 M, hexane) was added to a cold diethyl ether solution of HC6F4OSi(iPr)3 (6.864 grams). After stirring for 1 hour, one quarter equivalent of boron trichloride was added. The solution was allowed to slowly reach room temperature, and then was stirred for 16 hours. LiCl was filtered off. The solution that passed through the filter was reduced to approximately 30% of its original volume, and pentane was added to cause precipitation. The mixture was chilled at -35° C for 16 hours, and the product was filtered off (B[C6F4OSi(iPr)3]4Li(Et2O)2.5): yield = 6.804 grams, 86 %. 1H NMR (CDCI3, 25° C): δ 3.42 (q, 10H), 1.27 (hp, 12H), 1.15 (t, 15H), 1.05 (d, 72H). 19F NMR (CDCI3, 25° C): δ -135.9 (m, 2F), -163.8 (m, 2F). Example 3.
Synthesis of [C6H5N(Bu)2H][B(C6F4OSi(iPr)3)4]: One equivalent of C6H5N(Bu)2HCl in dichloromethane was added to a dichloromethane solution of (B[C6F4OSi(iPr)3]4Li(Et2O)2.5) (5.974 grams). The reaction was stirred for 2 hours. LiCl was filtered off, and the solution volume was reduced to approximately 30 %. Pentane was added to cause precipitation. The mixture was chilled to -35° C for 16 hours. The product was filtered off. [C6H5N(Bu)2H][B(C6F OSi(iPr)3)4]: yield = 5.488 grams, 91 %. 1H NMR (Toluene-d8, 25° C): δ 7.29 (t, 2H), 7.12 (t, IH), 6.88 (d, 2H), 3.15 (4H), 1.36-0.80 (m, 98H). 19F NMR (Toluene-d8, 25° C): δ -129.6 (d, 8F), -157.0 (d, 8F).
Polymerization reactions
Ethylene and propylene were copolymerized in a 2 liter, continuous stirred tank reactor operating at 100° C using bisføαrα-triethylsilyl-phenyl) methylene (2, 7- (di-tert-butyl) fluorenyl) (cyclopentadienyl) hafnium dimethyl as the metallocene catalyst. The compound of Example 3 was the cocatalyst activator. Runs 1 and 2 of Tables la and lb are representative. For Run 1, the catalyst system was preactivated in toluene. For Run 2, the catalyst system was preactivated in hexane. The collection times listed on Table 1 ("Time") refer to the time after which the polymer solutions were collected. A 25% (wt) solution of tri-n-octyl aluminium was used as scavenger. The scavenger-to-catalyst ratio for these key reactions was 17. The polymers were precipitated with isopropyl alcohol and dried in a vacuum oven at 75 °C. The ethylene percentages in the samples were determined by IR (calibrated to NMR).
Table la. Copolymerization Reactions of Ethylene and Propylene.
1 Weight percent of polymer in solution.
2 Time collecting sample.
The rate at which polymer was produced. 4 Percent of monomers converted. Table lb. Copolymerization Reactions of Ethylene and Propylene.
Grams of polymer solution collected during the time given on column 3 of Table la. 6 Determined by GPC.
While certain representative embodiments and details have been provided in order to illustrate the invention, it will be apparent to skilled artisans that various process and product changes from those disclosed in this specification may be made without departing from this invention's scope, which the appended claims define.
All patents, test procedures, and other documents cited in this specification are fully incorporated by reference to the extent that this material is consistent with the specification and for all jurisdictions in which such incorporation is permitted.

Claims

CLAIMS:
1. A catalyst composition for olefin polymerization comprising the reaction product of (a) an organometallic catalyst having at least one stabilizing ligand and a labile ligand into which olefins can insert; and (b) a cocatalyst comprising a cation [Ct]+ and an anion [A]", the anion comprising a Group- 13 element connected to at least one independently-selected fluoroaryl ligand, wherein at least one fluoroaryl ligands is para-substituted with a siloxy group represented by the symbols -
SiOR3, and each R is independently a -C30 hydrocarbyl or hydrocarbylsilyl substituent.
2. The catalyst composition of claim 1 wherein the cocatalyst is represented by the formula:
[Ct]+ [M(ArF)n((ArF)OSiR3)4-n]-3
wherein
(a) [Ct]+ is an activating cation;
(b) M is boron or aluminum;
(c) ArF are each independently fluoroaryl groups, wherein each fluoroaryl group has at least one fluorine substitution; and
(d) R are each independently CrC20 hydrocarbyl or hydrocarbylsilyl substituent wherein R is attached to the Si atom through a secondary or tertiary carbon atom.
3. The catalyst composition of claim 2 wherein at least one fluorinated aryl group is perfluorinated.
4. The catalyst composition of claim 3 wherein each fluorinated aryj group is perfluorinated.
5. The composition according to claims 1, or 2, 3, or 4 where [Ct]+ is one of anilinium cations, ammonium cations, trityl carbenium cations, Group-11 metal cations, silylium cations, hydrated Group-1 or -2 salt cations, and derivatives of anilinium, ammonium, trityl carbenium, and silylium cations containing d- C2o hydrocarbyl, hydrocarbylsilyl, or hydrocarbylamine substitutions for one or more hydrogen atoms on the cations.
6. The catalyst composition according to claims 1- 4 wherein the organometallic catalyst is a Group-3-10 metal compound activable to a monovalent cation for olefin polymerization.
7. The catalyst composition of claim 6 wherein the organometallic catalyst is a
Group-3 -6 metallocene having the formula:
wherein,
(a) LA is a (un)substituted cyclopentadienyl or heterocyclopentadienyl li- gand connected to Mc;
(b) LB is a member of LA ligands, or is J, a heteroatom ligand connected to Mc;
(c) optionally, LA and LB are linked through a Group- 13-16-element- containing group; (d) LCι is an optional neutral, non-oxidizing ligand connected to Mc;
(e) i equals 0-3;
(f) Mc is a Group-3-6 metal; and
(g) D and E are independently labile ligands, optionally bridged to each other or to LA or LB, with a metal-carbon connection to Mc that can be broken by the Group-13 cocatalyst and into which a polymerizable monomer or macromer can insert for polymerization.
8. The catalyst composition of claim 6 wherein Mc is titanium and LB is J, a heteroatom ligand connected to Mc.
9. The catalyst composition of claim 6 wherein Mc is zirconium or hafnium and LB is independently a substituted or unsubstituted cyclopentadienyl or hetero- cyclopentadienyl ligand connected to Mc.
10. A process for preparing polyolefins from one or more olefinic monomers comprising combining the olefins under polymerization conditions with an olefin polymerization catalyst of Claims 1-8.
11. The process of claim 9 wherein the organometallic catalyst is a Group-3- 10 transition metal compound activable for olefin polymerization.
12. The process of claim 10 wherein olefin polymerization conditions comprise a solution, supercritical pressure, bulk, slurry, or gas phase process conducted at reaction temperatures from 30-300 °C and pressures from 0-2000 bar.
13. The process according to claim 11 wherein the process is an adiabatic solution process conducted at a reaction temperature from 40-250 °C.
14. The process according claim 11 wherein the activated organometallic complex is carried on or affixed to a particulate support material.
15. The process according to claim 11 wherein the olefinic monomers are selected from ethylene, C3-C20 olefins, C5-C2Q diolefins, C7-C2o vinyl aromatic mono- mers, C -C20 geminally disubstituted olefins, or C5-C20 cyclic olefins.
16. The use of the catalyst composition of claims 1-8 for olefin polymerization.
17. A polymer made by a process comprising combining olefin monomer(s) with a catalyst composition of claims 1-8.
EP01948483A 2000-06-23 2001-06-19 Siloxy substituted cocatalyst activators for olefin polymerization Ceased EP1297027A1 (en)

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