MXPA01003576A

MXPA01003576A - Bridged metal complexes for gas phase polymerizations

Info

Publication number: MXPA01003576A
Application number: MXPA/A/2001/003576A
Authority: MX
Inventors: D Devore David; David R Neithamer
Original assignee: The Dow Chemical Company
Priority date: 1998-10-08
Filing date: 2001-04-06
Publication date: 2003-02-17

Abstract

A gas phase olefin polymerization wherein the catalyst comprises a novel Group 4 transition metal complex containing a boron or aluminum bridging group containing a nitrogen containing group, especially an amido group.

Description

PUENTEATED METALLIC COMPLEXES FOR GASEOUS PHASE POLYMERIZATIONS BACKGROUND OF THE INVENTION This invention relates to the use of certain bridged Group 4 transition metal complexes, which have a structure for single bridge connection, in a gas phase olefin polymerization catalyst. The unique bridge consists atoms of either boron or aluminum that are linked • additionally with groups containing nitrogen. The unique bridging structures in the complexes give the gas phase olefin polymerization catalysts a exceptionally high catalytic efficiency and processes that provide unique polymer properties. In Angew. , Chem. Int. Ed. Engl., 36, 21, • p2338-2340 (1997) and in Phosphorus, Sulfur, and Silicon, 124 and 125, p561-565 (1997) describe ferrocenphans bonded by boron bridge, substituted with amide, useful for the formation of poly (ferrocene) by a ring-opening polymerization. The synthesis and characterization of Group 1 and 2 metal and the tin complexes of 1,2-bis (dimethylamino) -l, 2-di-9-fluorenyldiborans are exposed in Chem. Ber. , 127, pl901-1908, (1994). In Eur. J. Inorq. Chem., P505-509 (1998) the diboranes are exposed, which have a structure similar to that used in the previous studies, by the same researchers. Ferrocenphane derivatives of similar bisborans are exposed for additional molecular property studies by J.

Organomet. Chem., 530 p117-120 (1997). In Organometallics, 16, p4546-4550 (1997) boron bridge bonded complexes of anus metallocene are exposed including dimethyl sulfide and phosphine adducts thereof, with possible use in olefin polymerizations of the Ziegler-Natta type. In the patent literature, EP-A-416,815 and WO 98/39369, bridged metal complexes are exposed generically for use as olefin polymerization catalyst components, including these complexes containing one or more atoms of boron on the bridge. The present invention relates to the use of certain dotted Group 4 transition metal complexes as olefin polymerization catalysts in a gas phase olefin polymerization, wherein the complexes correspond to the following formulas: Y1 / \ tz \ TZ MQ q \ "XX Formula 1 or Formula 2 where: M is titanium, zirconium or hafnium, in the oxidation state +4, +3, or +2; Y1 and Y2 are independently a group p -unit, anionic, cyclic or non-cyclic, NR1, PR1; NRX2 or PRX2; Z is boron or aluminum; Q is a neutral, anionic or dianionic ligand group that depends on the oxidation state of M; j is 1, 2 or 3 , depending on the state of oxidation of M and the electronic nature of Q; • independently T in each event is: R1 is independently in each event hydrogen, a hydrocarbyl group, a group ^ F tri (hydrocarbyl) silyl or a tri (hydrocarbyl) silylhydrocarbyl group, the R1 groups contain up to 20 atoms not counting hydrogen; R5 is R1 or N (R1) 2; and two R1 groups together or one or more R1 groups together with R5 may be optionally linked to form a ring structure. It must be understood that metal complexes The above can exist as dimers and that one or more Lewis bases can optionally be coordinated with the complex or the dimer thereof and that when Y1 or Y2 are the neutral ligands, NRX2 or PRX2, the link to M is a covalent coordinate link in place to be a • covalent bond. In addition, when T is R12N and Z is 5 boron, the bond between T and Z, particularly in the compounds of formula 1, may possess double bond characteristics, ie, the resulting group is represented more precisely by the formula R12N = B. In addition, the compositions catalysts suitable additionally in a way Desirably, they comprise an activating cocatalyst and a support. The above metal complexes are produced by the rion of a derivative metallized from a compound of one of the formulas: Formula 1A or Formula 2A wherein Z, T, R1 and R5 are as defined in the above; Y1 'and Y2' are a p-linked, anionic, cyclic or non-cyclic group, NR1 or PR1; and R 4 is hydrogen or a trimethylsilyl group, with a metal salt of the formula MY34, wherein M is a Group 4 metal and Y 3 is a leaving group, especially halide. The reagents can be combined either as pure reagents or in an inert solvent. Temperatures between -100 ° C and 150 ° C are preferred. In a particularly preferred embodiment, the complexes of the formula 1 and 2 are prepared in high racemic purity, in the formal +2 oxidation state by contacting the metallized derivatives of the compounds of the formula 1A or the formula 2A, with a precursor of Group 4 of formula 3: Formula 3 wherein M and Y3 are defined as above, R6 independently in event is hydrogen, a hydrocarbyl group, a tri (hydrocarbyl) silyl group or a tri (hydrocarbyl) silyl hydrocarbyl group, the R6 groups containing up to atoms do not take hydrogen into account; and LB is a Lewis base, especially an ether, amine or phosphine of up to 20 carbon atoms. The complexes are desirably prepared in an inert solvent, especially an aliphatic or aromatic hydrocarbon or ether, using temperatures between -100 ° C and 150 ° C. This technique is similar to that described in U.S. Patent Application No. 265,641 filed March 10, 1999, which differs in that different starting reagents are used. The process of the present invention can be used in combination with one or more additional polymerization processes, either in parallel or in series, using the same or different rors. Because the catalyst compositions have improved catalytic efficiencies and improved thermal stability, they are adapted particularly for use under temperatures of • Major operations and poor thermal transport conditions, such as those commonly encountered under gas phase polymerization conditions. 15 All references to the Periodic Table of the Elements herein shall refer to the Periodic Table of the Elements, published and copyrighted by CRC Press, Inc., 1997.

• Also, any references to a Group or Groups, should be made to the Groups or Groups reflected in this Periodic Table of the Elements using the IUPAC system for numbering groups. By the term "p-linked", in the sense in which it is used in the present, it must be understand that the union is presented through an interaction that involves electrons moved from their place. Finally, by the term, "leaving group" is to be understood as a ligand that is easily displaced by another ligand under conditions of ligand exchange. The Group 4 transition metal complexes hereof contain a single bridge (TZ) or (TZ) 2 linked group, which imparts improved catalytic properties when used in combination with one or more activating cocatalysts or activation techniques in the presence of the addition of polymerizable monomers. While not wishing to be bound by theory, it is believed that the improvement in the catalytic properties of these complexes may be due to the properties of electronic donation or electronic extraction of entities Y1 and Y2. The preferred Group 4 transition metal complexes are those corresponding to formula 1 or 2 and are represented in formulas 4, 5, 6, 7, 8 and 9: Formula 4 Formula 5 Formula 6 Formula 7 Formula 8 Formula 9 where M, Z, T, Q and j are as defined in the above; R2 is hydrogen, or a hydrocarbyl, halohydrocarbyl, dihydrocarbylamino-hydrocarbyl tri (hydrocarbylsilyl) idrocarbyl, Si (R3) 3, N (R3) 2, or an OR3 group of up to 20 carbon or silicon atoms and optionally two adjacent R2 groups may be joined together, thereby forming a fused ring structure, especially an indenyl ligand or a substituted indenyl ligand; and R3 is independently hydrogen, a hydrocarbyl group, a trihydrocarbylsilyl group or a trihydrocarbylsilylhidorcarbyl group, R3 has up to 20 atoms not counting hydrogen. When M is in the oxidation state +4, j = 2 and Q independently in each event is halide, hydride, hydrocarbyl, silylhydrocarbyl, hydrocarbyl oxide dihydrocarbylamide, the Q group has up to 20 atoms not counting hydrogen. Alternatively, two Q groups can be linked together to form an alkyndiyl group or a conjugated C4-4rj diene ligand that coordinates to M in a metalocyclopentane form. When M is in the oxidation state +3, j = 1 and Q is either 1) an anionic, monovalent stabilizing ligand, selected from the group consisting of alkyl, cycloalkyl, aryl, silyl, amido, phosphido, alkoxy, aryloxy, sulphide groups and mixtures thereof; and is substituted with an ether phosphine ether or thioether containing a substituent capable of forming a covalent coordinate bond or a chelating bond with M, the ligand has up to 50 atoms not counting hydrogen; or 2) a C3_? 0 hydrocarbyl group containing an ethylenic unsaturation capable of forming a? 3 bond with M. When M is in the oxidation state +2, j = 1 and Q is a neutral conjugated diene, optionally substituted with one or more tri (hydrocarbyl) silyl or tri (hydrocarbylsilyl) hydrocarbyl, the Q group has up to 40 carbon atoms and forms a p-complex with M. The specific examples of the above metal complexes, where M is in the oxidation state +4, are shown later in formulas 4a-9a, where the definitions of M, Z, R1, R2, and R3 are as defined in the foregoing: Formula 4a Formula 5a Formula 6a Formula 7a Formula 8a, 0 Formula 9a wherein Q, independently in each event is a halide, hydrocarbyl, hydrocarbyloxy or dihydrocarbylamide group of up to 10 atoms not counting hydrogen, or the two Q groups together form a C4-2 or diene ligand coordinated to M in a metalocyclopentene form. Most preferably, Q independently in each event is chloride or hydrocarbyl groups C? -6 or the two Q groups together form a 2-met il-1,3-butadienyl or 2,3-dimet il-1, 3- group butadienyl. Specific examples of the above metal complexes wherein M is in the oxidation state +3 are shown below in formulas 4b-9b, where the definitions of M, Z, R1, R2 and R3 are as defined in previous: Formula 7b Formula 8b Formula 9b wherein Q, in each event is an anionic, monovalent stabilizing ligand, selected from the groups consisting of alkyl, cycloalkyl, aryl and silyl which are further substituted with one or more amine, phosphine or ether substituents capable of forming a covalently coordinated bond or a chelating link with M, the Q group has up to 30 atoms without hydrogen; or Q is a C3-? hydrocarbyl group or comprising an ethylenic unsaturation capable of forming a? 3 bond with M. The most preferred examples of these ligands. Q are 2-N, N-dimethylaminobenzyl, allyl and 1-met yl-allyl. Specific examples of the above metal complexes, wherein M is in the oxidation state +2 are shown below in formulas 4c-9c, where the definitions of M, Z, R1, R2, and R3 are as defined in the above: Formula 7c Formula 8c Formula 9c, 0 where Q, in each event is a neutral conjugated diene, optionally substituted with one or more tri (hydrocarbyl) silyl groups or tri (hydrocarbyl) silylhydrocarbyl groups, the Q group has up to 30 atoms not counting hydrogen and form a p-complex with M. The most preferred Q groups are 1,4-diphenyl-1,3-butadiene, 1,3-pentadiene, 3-methyl-1,3-pentadiene, 2,4-hexadiene, 1-phenyl-1. , 3-pentadiene, 1,4-dibenzyl-l, 3-butadiene, 1,4-ditolyl-1,3-butadiene, 1,4-bis (trimethylsilyl) -1, 3-butadiene, and 1,4-dinaphthyl -1, 3-butadiene. Preferably in the above formulas, R1 independently in each event is alkyl or C? -4 phenyl, more preferably methyl or isoproyl, most preferably methyl, Y1 and Y2 are both inden-1-yl, 2-alkyl-4 -arilinden-1-yl, or 3-alkylinden-1-yl, Y 1 is cyclopentadienyl substituted with alkyl and Y 2 is fluorenyl; Z is boron and Q is halide, alkyl, N, N-dialkylamido, or 1,4-diphenyl-1,3-butadiene (the alkyl or aryl groups have up to 10 carbon atoms). Even more preferably, in the formulas 4a-c and 8a-c, M is zirconium or hafnium and R1 is methyl or isopropyl, more preferably methyl. During the synthesis of these complexes, the use of methyl R 1 groups provides high, often quantitative, yields of the rae isomer. In formulas 5a-c, 6a-c, 8a-c and 9a-c, M is even more preferred titanium, Z is boron and R1 is alkyl or phenyl, more preferably methyl or C? -4 isopropyl. The most preferred metal complexes are those of the formulas 4a-c and 8a-c wherein Y1 and Y2 are both inden-1-yl, 2-methyl-4-phen-linden-1-yl, 3-isopropylinden-l- groups ilo, or 3-t-but? linden-1-yl, in particular the compositions comprise more than 90 percent of the radical isomer. The specific, but non-limiting, metal complexes included with the invention described in the following formulas are: dimethylamidoboran-bis-? 5- cyclopentadienyl zirconium dichloride; dimethylamidoboran-bis-? -cyclopentadienyl zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- cyclopentadienyl zirconium; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5-cyclopentadiezyl zirconium allyl; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium? 4-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl zirconium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium dichloride; dimethylamidoboran-bis-? 5-n-butylcyclopentadiezyl zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclo-pentadiezyl zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoboran-bis-? -n- butylcyclopentadienyl zirconium 2-N, N-dimethylaminobenzyl; • dimethylamidoboran-bis? 5-n-5-butylcyclopentadienyl zirconium allyl; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 4-l, 4-diphenyl-1, 3-butadiene; dimethylamidoboran-bis-? 5-n-10-butylcyclopentadienyl zirconium? 4-2,4-hexadiene; • dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? -l, 4-dinaphthyl-1, 3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienil zirconium 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 5-l, 3-pentadiene; dimethylamidoboran-bis-? 5-inden-? 1-ylcirconium dichloride; 20-dimethylamidoboran-bis-? 5-inden-l-ylkythio dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5-inden-l-? lcirconium; dimethylamidoboran-bis-? -inden-l-ylcirconium 25 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5-inden-l-ylcirconium allyl; dimethylamidoboran-bis-? 5-inden-l-ylcirconium? -l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium? -2, 4-hexadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium? -l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l, 3-phenyl-l, 3-pentadiene; dimethylamidoboran-bis-? 5-inden-l-ylcirconium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-met i linden-1-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l, 4-diphenyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l- • il) zirconium? 4-2,4-hexadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? -l-phenyl-1,3-pentadiene; dimethylamidoboran-bis? 5- (2-methylinden-1-yl) zirconium? 4-l, 3-pentadiene; • dimethylamidoboran-bis? 5- (2-methyl-4-phenylinden-l-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dimethyl; 15 bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methyl-4-phenyl-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; Dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-met il-4-phenylinden-1-yl) zirconium -2,4-hexadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylalinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-l-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-2,4-hexadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? -1 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? phenyl-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-? phenylinden-1-yl) zirconium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-l-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide dimethylamidoboran-bis-10? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium; • dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; 15-dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylmden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-isopropyl-l-4-phenylinden-1-yl) zirconium allyl; • dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? -4-2, 4-hexadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; dimethylamidoboran-bis- dichloride - (2- • methyl-4-naphthinden-l-yl) zirconium; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-methyl-4-10 naphthinden-1-yl) zirconium 2-methyl-1,3-butadiene; • dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; 15-dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-? l) zirconium? 4-diphenyl-1,3-butadiene; • dimethylamidoboran-bis-? 5- (2-methyl-4- 20 naphthinden-1-yl) zirconium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium? 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; 25-dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? 4-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) pheni-linden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-10-trifluoromethyl) phenylinden-1-yl) zirconium 2,3-dimethyl- • 1,3-butadiene; dimethylamidoboran-bis-? 5- (2-met il-4-bis (3, 5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; 15-dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3, 5-trifluoromethyl) phenylinden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-met il-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-diphenyl- • 1,3-butadiene; 20-dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium-4-2,4-hexadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium; • dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3, 5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-yl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; 20-dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-yl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-diphenyl-1,3-butadiene; 25 dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? -2,4- hexadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5- trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -l-3- pentadiene; dimethylamidoboran-bis-? 5- (2-10-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (2-isopropyl-4- bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dimethyl; 15 bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (2-isopropyl-4- bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium 2-methyl-1, 3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4- bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 1,4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium-2,4,4-hexadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 1,4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl linden-1-yl) zirconium? 4-l phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 1,3-pentadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dichloride; dimethylamidoboran-bis-? 5- (3-? - propylinden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis? 5- (3-isopropylinden-1-yl) zirconium; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? -2, 4-hexadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 1,4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-10 1 -yl) zirconium? -l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium dichloride; 15 dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium; • dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; 25 dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium allyl; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium? -diphenyl-1, 3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5-10 cyclopentadienylzirconium dichloride; • diisopropylamidoboran-bis-? 5- cyclopentadienylzirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5-cyclopentadienylzirconium; 15 diisopropylamidoboran-bis-? 5- cyclopentadienylzirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylzirconium 2,3-dimethyl-1,3-butadiene; ^^ diisopropylamidoboran-bis-? 5- 20 cyclopentadienylzirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- cyclopentadienylcirconium allyl; diisopropilamidoboran-bis-? 5- cyclopentadienylcirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylzirconium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5-cyclopentadienylzirconium? -l, 4-dinaphthyl-1,3-butadiene; diisopropylamidoboran-bis-? cyclopentadienylzirconium 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylzirconium? 5-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- inden-1-ylcirconium dichloride; diisopropylamidoboran-bis-? 5-inden-l-ylkythio dimethyl; bis-dimethylamide diisopropylamidoboran-10 bis-? 5-inden-l-ylcirconium; • diisopropylamidoboran-bis-? 5-inden-l-ylcirconium 2-methyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5-inden-l-ylcirconium 2,3-dimethyl-l, 3-butadiene; 15 diisopropylamidoboran-bis-? 5-inden-l-ylcirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5-inden-l-ylcirconium allyl; • diisopropylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l, 4-diphenyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5-inden-l-ylcirconium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; 25 diisopropylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5-inden-l-ylcirconium? -1, 3-pentadiene; diisopropylamidoboran-bis- dichloride - (2-methylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dichloride; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, -dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) zirconium dichloride; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-met il-4-naphthylmden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylmden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-10 naphthinden-1-yl) zirconium? 4-l, 4-diphenyl-l, 3-? butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (naphthylinden-1-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; • diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthalin-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-met il-4- (3,5-dimethylphenyl) inden-1-yl) zirconium dichloride; dimethyl diisopropylamidoboran-bis-? 5- (2-methyl- (3, 5-dimethylphenyl) inden-1-yl) zirconium; 25 diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium bis-dimethylamide; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethyl-phenyl) inden-1-yl) zirconium 2-N, N-dimethyl-laminobenzyl; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3, 5-dimethylphenyl) inden-1-yl) zirconium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-dimethylphenyl) inden-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromet-il-phenyl) -indyl-1-yl) zirconium dichloride; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-met-il-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium 2-met i 1- 1, 3-butadiene; diisopropylamidoboran-bis-? 5-? 2-methyl-4- (3, 5-difluoromethylphenyl) inden-1-yl) zirconium 2,3- • dimethyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; 15 diisopropylamidoboran-bis-? 5- (2-methyl-4- (3, 5-difluoromethylphenyl) inden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3, 5-difluoromet ilphenyl) inden-1-yl) zirconium? -l, 4-ββ-diphenyl-1,3-butadiene; 20 diisopropylamidoboran-bis-? 5- (2-methyl-4- (3, 5-difluoromethylphenyl) inden-1-yl) zirconium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4- (3,5-difluoromethylphenyl) inden-1-yl) zirconium? -l, 3-pentadiene; diisopropylamidoboran-bis- dichloride - (2-ethyl-4-phenylinden-l-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? b- (2-isopropyl-4-phenylinden-l-yl) zirconium dichloride; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? -2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dichloride; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium allyl; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, -diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 3-pentadiene; diisopropylamidoboran-bis- dichloride - (3-t-butylinden-l-yl) zirconium; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium; diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-t-10-butylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; ^ diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium allyl; 15 diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium? -2, 4-hexadiene; # diisopropylamidoboran-bis-? 5- (3-t-20 butylinden-l-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (3-t-25-butylinden-l-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- cyclopentadiezyl zirconium dichloride; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium dimethyl; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium bis-dimethylamide; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium 2-met il-1,3-butadiene; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium allyl; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium? -l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis? 5-cyclopentadienyl zirconium? -2, 4-hexadiene; diphenylamidoboran-bis-? 5-cyclopentadiezyl zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; diphenylamidoboran-bis-? 5-cyclopentadiezyl zirconium? -l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5-cyclopentadienyl zirconium? 5-l, 3-pentadiene; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium dichloride; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium dimethyl; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium bis-dimethylamide; diphenylamidoboran-bis-? -n- butylcyclopentadiezyl zirconium 2-met il-1,3-butadiene; diphenylamidoboran-bis-? 5-n- • butylcyclopentadienyl zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5-n-10-butylcyclopentadienyl zirconium allyl; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 4-l, 4-diphenyl-1, 3-butadiene; diphenylamidoboran-bis-? 5-n-15-butylcyclopentadienyl zirconium? 4-2,4-hexadiene; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 4-l, 4-dinaphthyl-1, 3-butadiene; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 4-l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5-n-butylcyclopentadienyl zirconium? 5-l, 3-pentadiene; diphenylamidoboran-bis-? 5-inden-251-ylcirconium dichloride; diphenylamidoboran-bis-? 5-inden-l-ylkythio dimethyl; diphenylamidoboran-bis-? 5-inden-l-ylcirconium bis-dimethylamide; diphenylamidoboran-bis-? 5-inden-l-ylcirconium 2-methyl-l, 3-butadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? -inden-1-ylcirconium allyl; diphenylamidoboran-bis-? -inden-1-ilcirconio? -1, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium? 4-2,4-hexadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium? 4-l-phenyl-l, 3-pentadiene; diphenylamidoboran-bis-? 5-inden-l-ylcirconium? -l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium dimethyl; Diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium bis-dimethylamide; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2-methyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? -2, 4-hexadiene; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l-phenyl-l, 3-pentadiene; 15 diphenylamidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? -l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-met-il-phenyl-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-methyl-4- 20 phenylinden-1? l) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-? 5- (2-met il-4-phenylinden-1-yl) zirconium; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; Diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 6- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -2, 4-hexadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 3 pentadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-l-yl) zirconium; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-? phenylinden-1-yl) zirconium? 4-2, 4-hexadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; 10 Diphenylamidoboran-bis-? 5- (2-ethyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; Diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene;. diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-2, 4-hexadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-pheni-linden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; 10 diphenylamidoboran-bis-? 5- (2- ^ methyl-4-naphthylinden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-15? 5- (2-methyl-4-naphthinden-1-yl) zirconium; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-? naphthinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; Diphenylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium 2-N, N-dimethyl-laminobenzyl; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? 4-l, 4-diphenyl-1, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? 4-2, 4-hexadiene; diphenylamidoboran-bis-? - (2-methyl-4-naphthinden-1-yl) zirconium 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-5-naphthinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium dichloride; Diphenylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-F-trifluoromethyl) phenyl-inden-1-yl) zirconium dimethyl; bis-dimethylamide of diphenylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium; Diphenylamidoboran-bis-? 5- (2-met-il-4-bis (3,5-trifluoromet il) phen? Linden-1-yl) zirconium 2-methyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-methyl-4-bis (3,5-trifluoromethyl) phen? l? nden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-met il-4-bis (3, 5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-methyl-4-bis (3,5- trifluoromethyl) phenylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-meth i 1-4 -bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-met il-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -2,4-hexadiene; diphenylamidoboran-bis-? 5- (2-met-il-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-met il-4 -bis (3,5-trifluoromethyl) feni linden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-met i 1-4 -bis (3,5-trifluoromethyl) phenylinden-l-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-et-il-4-bis (3,5-trifluoromethyl) phenyl linden-1-yl) zirconium 2-N, N-dimethyl-laminobenzyl; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-indenyl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -1,4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-2,4-hexadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -1,4-dinaphthyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-ethyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dimethyl; bis-dimethylamide diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) fe-ilinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-1, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-2, -hexadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium? 4-1,4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (2-isopropyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium? 4-1,3-pentadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dichloride;diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dimethyl; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium bis-dimethylamide; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-2,4-hexadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 3-pentadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium dichloride; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium dimethyl; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium bis-dimethylamide; diphenylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium 2-methyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; diphenylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium allyl; diphenylamidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium? -l, 4-diphenyl-1,3-butadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-l- # il) zirconium? 4-2, 4-hexadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? -l, 4-dinaphthyl-1,3-butadiene; 15 diphenylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; diphenylamidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-l, 3-pentadiene; • bis (trimethylsilyl) amidoboran-20 bis-? 5-cyclopentadienylzirconium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylzirconium dimethyl; Bis (dimethylsilyl) amidoboran-bis-5-cyclopentadienylzirconium bis-dimethylamide; 25 bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylzirconium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylzirconium 2,3-dimethyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? -cyclopentadienylzirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylcirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylzirconium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylzirconium? -2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylzirconium? -l, 4-dinaphthyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylzirconium? 4-l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylcircomo? 5-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium dimethyl; Bis (dimethylsilyl) amidoboran-bis-5-inden-1-zirconia bis-dimethylamide; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium 2-methyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-1-ylcir such as 2,3-d? methyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l- 9 -titronconium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylcirconium? -l, 4-dinapht-1, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-10-ylcirconium? -l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l- # ilchirconium? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium dichloride; 15 bis (trimethylsilyl) amidoboran-bis-? 6- (2-methylinden-1-yl) zirconium dimethyl; Bis (dimethylsilyl) amidoboran-bis- (5- (2-methylinden-1-yl) zirconium bis-dimethylamide; * bis (trimethylsilyl) amidoboran-bis-? 5- (2- 20 methylinden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; 25 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? - (2-methylinden-1-yl) zirconium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-met i linden-1-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) zirconium? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-met yl-phenyl-inden-1-yl) zirconium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dimethyl; Bis (dimethylsilyl) amidoboran-bis- (5- (2-methyl-4-phenyl-inden-1-yl) zirconium bis-dimethylamide; bis (trimethylsilyl) amidoboran-bis-? - (2-methyl-4-phenyl-inden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2- ^ PV methyl-4-phenylinden-1-yl) zirconium? 4-2, 4-hexadiene; 5 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-l-yl) zirconium? 4-l-phenyl-l, 3-10 pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dichloride; 15 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dimethyl; bis (dimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium bis-dimethylamide; 20 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2-methyl-1, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? - (2-methyl-4-naphthinden-1-yl) zirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-? met il-4-naphthinden-1-yl) zirconium? 4-l, 4-diphenyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) zirconium? 4-2,4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) zirconium? -l, 4-dynaphthyl-l, 3- 10-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2- # methyl-4-naphthinden-l-yl) zirconium? -l-phenyl-l, 3- pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium dimethyl; # 20 bis-dimethylamide of bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? - (3-isopropylinden-1-yl) zirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; ? bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? -l-phenyl-l, 3- pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) zirconium? 4-l-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium dimethyl; 20 bis-dimethylamide of bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-25 but? linden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium 4-l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) zirconium? -l, 3- pentadiene; bis (diisopropylamido) diboran-l, 2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dichloride; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dimethyl; bis-dimethylamide of bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methy1-4-phenylinden-1-yl) zirconium; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-. methyl-4-phenylinden-l-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (diisopropylamido) diboran-1, 2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -2, 4-hexadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-l-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium dichloride; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium 2-met il-1,3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5-cyclopentadienil • hafnium allyl; 5-dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl 10 hafnium? 4-l, 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5-cyclopentadienyl hafnium? 5-l, 3-pentadiene; Dimethylamidoboran-bis? 5-n-butylcyclopentadienyl hafnium dichloride; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-20? 5-n-butylcyclopentadienyl hafnium; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? -n-butylcyclopentadienyl hafnium allyl; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium? -2, 4-hexadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium? 4-l, 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5-n-butylcyclopentadienyl hafnium? 5-l, 3-pentadiene; dimethylamidoboran-bis-? 5-inden-1-ylhafnium dichloride; dimethylamidoboran-bis-? 5-inden-l-ylhafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5-inden-1-ylhafnium; dimethylamidoboran-bis-? 5-ind_en-l-ylhafnium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylhafnium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylhafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5-inden-l-ylhafnium allyl; dimethylamidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 4-diphenyl-l, 3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylhafnium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5-inden-l-ilhafnium? -l, 4-dinaphthyl-1,3-butadiene; dimethylamidoboran-bis-? 5-inden-l-ylhafnium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5-inden-l-ilhafnium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dichloride; dimethylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium 2-methyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium allyl; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-l, 4-diphenyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l- • il) hafnium? -l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-l-phenyl-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dichloride; • dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium; 15-dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4- phen? linden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; • dimethylamidoboran-bis-? 5- (2-methyl-4- 20 phenylinden-l-yl) hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-methyl-4-phen? linden-1-yl) hafnium allyl; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; 25-dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-2, 4-hexadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) hafnium? 4-l-phenyl-1,3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-? phenylinden-1-yl) hafnium? -l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) hafnium dichloride; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-10? 5- (2-methy1-4 -naphthylinden-1-yl) hafnium; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; 15-dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium allyl; • dimethylamidoboran-bis-? 5- (2-methyl-4- 20 naphthylinden-1-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? -2, 4-hexadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; Dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium? 4-l-phenyl-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium? 4-l, 3-pentadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium dichloride; dimethylamidoboran-bis-? 5- (3-isopropylinden- • l -yl) hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-methyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-10 1 -yl) hafnium 2,3-dimethyl-l, 3-butadiene; • dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium aillo; 15 dimethylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-l-yl) hafnium? 4-2, 4-hexadiene; • dimethylamidoboran-bis-? 5- (3-isopropylinden-20 1 -yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-l-yl) hafnium? 4-l-phenyl-1, 3-pentadiene; dimethylamidoboran-bis-? 5- (3-isopropylinden-l-yl) hafnium? -l, 3-pentadiene; 25 dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium dichloride; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium dimethyl; bis-dimethylamide of dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium 2-methyl-1,3-butadiene; 5-dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium 2,3-dimethyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium 2-N, -dimethylaminobenzyl; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium allyl; • dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium? 4-2, 4-hexadiene; 15 dimethylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium? -l, 4-dinaphthyl-l, 3-butadiene; dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l-phenyl-l, 3-pentadiene; • dimethylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium dichloride; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium dimethyl; 25 bis-dimethylamide diisopropylamidoboran-bis-? 5-cyclopentadienylhafnium; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? - cyclopentadienylhafnium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- • cyclopentadienylhafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium allyl; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium? 4-l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5-10 cyclopentadienylhafnium? -2, 4-hexadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium? 4-l-phenyl-1,3-pentadiene; 15 diisopropylamidoboran-bis-? 5- cyclopentadienylhafnium? 5-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- inden-1-ylhafnium dichloride; • diisopropylamidoboran-bis-? 5-inden-l-20-ylhafnium dimethyl; bis-dimethylamide of diisopropylamidoboran-bis-? 5-inden-l-ylhafnium; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium 2-methyl-l, 3-butadiene; Diisopropylamidoboran-bis-? 5-inden-l-ylhafnium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium allyl; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 4-diphenyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 4-dinapht-1, 3-butadiene; diisopropylamidoboran-bis-? 5-inden-l-yl-hafnium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dichloride; diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium 2-methyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium 2,3-dimeti 1-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium allyl; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-l, 4-diphenyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium-? -l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methylinden-l-yl) hafnium? -l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dichloride; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylmden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium allyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? -l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-l-yl) hafnium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-1-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? -l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methy1-4 -naphthinden-1-yl) hafnium dichloride; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium dimethyl; bis-dimethylamide diisopropylamidoboran-10 bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium; • diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; 15 diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium allyl; • diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-2,4-hexadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; Diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-l-phenyl-1, 3-pentadiene; diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthylinden-1-yl) hafnium? 4-l, 3-pentadiene; diisopropylamidoboran-bis- dichloride - (3-isopropylinden-1-yl) hafnium; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium dimethyl; bis-dimethylamide diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-10-isopropylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; • diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-N, -dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium allyl; 15 diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, 4-diphenyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-2,4-hexadiene; 20 diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l-phenyl-1,3-pentadiene; diisopropylamidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium dichloride; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium dimethyl; bis-dimethylamide diisopropylamidoboran-? bis-? 5- (3-t-butylinden-1-yl) hafnium; diisopropylamidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium 2-methyl-1,3-butadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium 2,3-dimethyl-l, 3-butadiene; diisopropylamidoboran-bis-? 5- (3-t-10-butylinden-l-yl) hafnium 2-N, N-dimethylaminobenzyl; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium allyl; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l, 4-diphenyl-l, 3-butadiene; 15 diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-2, 4-hexadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; • diisopropylamidoboran-bis-? 5- (3-t-20 butylinden-l-yl) hafnium? 4-l-phenyl-l, 3-pentadiene; diisopropylamidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? -l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5-cyclopentadienylhafnium dichloride; 25 bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium dimethyl; Bis (dimethylsilyl) amidoboran-bis-5-cyclopentadienylhafnium bis-dimethylamide; bis (trimethylsilyl) amidoboran-bis-? Cyclopentadienylhafnium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- • cyclopentadienylhafnium 2,3-dimethyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium allyl; bis (trimethylsilyl) amidoboran-bis-? 5-10 cyclopentadienylhafnium? -l, 4-diphenyl-1,3-butadiene; • bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium? -l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium? 4-l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- cyclopentadienylhafnium? 5-l, 3-pentadiene; • bis (trimethylsilyl) amidoboran-20 bis-? 5-inden-1-ylhafnium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5-inden-1-ylhafnium dimethyl: bis (dimethylsilyl) amidoboran-bis-? 5-inden-1-yl-hafnium bis-dimethylamide; 25 bis (trimethylsilyl) amidoboran-bis-? 5-inden-1-ylhafnium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium allyl; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 4-dinaphthyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ilhafnium? -l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5-inden-l-ylhafnium? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium dimethyl; Bis (dimethylsilyl) amidoboran-bis- (5- (2-methylinden-1-yl) hafnium bis-dimethylamide; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium allyl; bis (trimethylsilyl) amidoboran-bis-? - (2-met i linden-1-yl) hafnium 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium-? 4-2,4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-meth i linden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methylinden-1-yl) hafnium? 4-l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2- (10-methylinden-1-yl) hafnium? 4-l, 3-pentadiene; • bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dimethyl; Bis bis (trimethylsilyl) amidoboran-bis-? 5- (2-metyl- phenylinden-1-yl) hafnium bis bis (dimethylamide) bis; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-methyl-1,3-butadiene; # bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; 25 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) -hafnium-4, 1,4-diphenyl-1, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-? met? l-4-phenylinden-1-yl) hafnium? 4-2,4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-met il-4-phenyl-linden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-l-yl) hafnium? 4-l-phenyl-l, 3-10 pentadiene; Bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium-? 4-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-met il-4-naphthinden-1-yl) hafnium dichloride; 15 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) hafnium dimethyl; bis (dimethylsilyl) amidoboran-bis- (5- (2-methyl-4-naphthinden-1-yl) hafnium bis-dimethylamide; Bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium 2-methyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium 2,3-dimethyl-l, 3-butadiene; 25 bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium allyl; Bis (trimethylsilyl) amidoboran-bis-? 5- (2-? Met il-4 -nafti linden-1-yl) hafnium? 4-l, 4-diphenyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) hafnium? -2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; • bis (trimethylsilyl) amidoboran-bis-? 5- (2-methyl-4-naphthinden-l-yl) hafnium? 4-l-phenyl-l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (2- 15 methyl-4-naphthylinden-1-yl) hafnium? -l, 3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (3- • isopropylinden-1-yl) hafnium imethyl; 20 bis-dimethylamide of bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium 4-l, 4-di-phenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-2,4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, -dinaphthyl-l, 3-butadiene; • bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-isopropylinden-1-yl) hafnium? 4-l, 3-pentadiene; 15 bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium dichloride; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium dimethyl; bis (dimethylsilyl) bis-dimethylamide amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium 2-methyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium 2,3-dimethyl-l, 3-butadiene; 25 bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium allyl; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l, 4-diphenyl-1,3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t- • butylinden-l-yl) hafnium? 4-2, 4-hexadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-l-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-butylinden-1-yl) hafnium? 4-l-phenyl-1,3-pentadiene; bis (trimethylsilyl) amidoboran-bis-? 5- (3-t-10-butylinden-l-yl) hafnium? 4-l, 3-pentadiene; • bis (diisopropylamido) diborane-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dichloride; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium dimethyl; 15 bis-dimethylamide of bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-methyl-1,3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2,3-dimethyl-l, 3-butadiene; bis (diisopropylamido) diboran-1,2-bis? 5- (2-methyl-4-phenylinden-1-yl) hafnium 2-N, N-dimethylaminobenzyl; 25 bis (diisopropylamido) diboran-1, 2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium allyl; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-l, -diphenyl-1, 3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-? methyl-4-phenylinden-l-yl) hafnium? 4-2,4-hexadiene; 5 bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenyl-linden-1-yl) hafnium? 4-l, 4-dinaphthyl-l, 3-butadiene; bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? 4-l-phenyl-l, 3-10 pentadiene; • bis (diisopropylamido) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l, 3-pentadiene; (? 5-tetramethylcyclopentadienyl) (ert-butylamido) diisopropylamidoboran titanium dichloride; 15 (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium dimethyl; bis-dimethylamide of (5- tetramethylcyclopentadienyl) (ert-butylamido) diisopropylamidoboran titanium; • 20 (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium 2-methyl-l, 3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium 2,3-dimethyl-l, 3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium allyl; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium? -1,4-diphenyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) diisopropylamidoboran titanium? 4-2,4-hexadiene; (? 5-tetramethylc? Clopentadienyl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (ert-butylamido) diisopropylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? 5-tetramethylc? Clopentadienyl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 3-pentadiene; (5-tetramethyl-cyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium dichloride; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium dimethyl; bis-dimethylamide of (? -tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium 2-methyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium 2,3-dimethyl-1,3-butadiene; • (? 5-tetramethylcyclopentadienyl) 5 (cyclohexylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium allyl; (? 5-tetramethylcyclopentadienyl) -10 (cyclohexylamido) diisopropylamidoboran titanium? 4-l, 4-? Diphenyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium? 4-2,4-hexadiene; 15 (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) • (cyclohexylamido) diisopropylamidoboran titanium? 4-l-20 phenyl-1,3-pentadiene; (? 5-tetramethylcyclopentadienyl) (cyclohexylamido) diisopropylamidoboran titanium? 4-l, 3-pentadiene; dichloride of (? 5-tet ramet ilcyclopentadienyl) 25 (tert-butylamido) bis (diisopropylamide) dibora titanium; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diboran dimethyl titanium; bis-dimethylamide of (β-tetramet-ilcyclopentadienyl) (ert-butylamido) bis (diisopropylamide) dibora titanium; • (? 5-tetramethylcyclopentadienyl) (tert-5-butylamido) bis (diisopropylamide) diborium titanium 2-methyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) dibora titanium 2,3-dimethyl-l, 3-butadiene; 10 (? 5-tetramethylcyclopentadienyl) (tert- • butylamido) bis (diisopropylamide) diborium 2- N, N-dimethylaminobenzyl titanium; (? 5-tet-ramethylcyclopentadienyl) (ert-butylamido) bis (diisopropylamide) diborium titanium 15 allyl; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diborium titanium? 4- 1, 4-diphenyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diborium 1,4-2,4-hexadiene titanium; (β-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diborium titanium 4- 1, 4-dinaphthyl-l, 3-butadiene; 25 (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diborium titanium? 4- 1 -phenyl-1,3-pentadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) bis (diisopropylamide) diborium titanium? - 1, 3-pentadiene; (? 5-tetramethylcyclopentadienyl) dichloride • (phenylamido) diisopropylamidoboran titanium; (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium dimethyl; bis-dimethylamide of (? 5- tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium; 10 (? 5-tetramethylcyclopentadienyl) (phenylamido) • diisopropylamidoboran titanium 2-methyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium 2,3-dimethyl-l, 3-butadiene; 15 (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium allyl; 20 (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium? -l, 4-diphenyl-1, 3-butadiene; (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium? -2, 4-hexadiene; 25 (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium? -l, 4-dinaphthyl-1, 3-butadiene; (? 5-tetramethylcyclopentadienyl) (phenylamido) diisopropylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? 5-tetramethylcyclopentadienyl) (phenylamido) • diisopropylamidoboran titanium? 4-l, 3-pentadiene; (5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium dichloride; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium dimethyl; bis-dimethylamide of (? -10-tetramethylcyclopentadienyl) (ert-butylamido) • dimethylamidoboran titanium; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium 2-methyl-l, 3-butadiene; 15 (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium 2,3-dimethyl-1,3-butadiene; (? 5-tetramethylcyclopentadienyl) (ert- • butylamido) dimethylamidoboran titanium 2-N, N-20 dimethylaminobenzyl; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium allyl; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium? 4-l, 4-diphenyl-l, 3-butadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido 'dimethylamidoboran titanium? 4-2,4-hexadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; • (? 5-tetramethylcyclopentadienyl) (tert-5-butylamido) dimethylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? 5-tetramethylcyclopentadienyl) (tert-butylamido) dimethylamidoboran titanium? 4-l, 3-pentadiene; 10 (5-inden-1-yl) (tert-butylamido) diisopropylamidoboran titanium dichloride; (? 5-inden-l-yl) (ert-butylamido) diisopropylamidoboran titanium dimethyl; (? 5-inden-l-yl) (tert-15-butylamido) diisopropylamidoboran titanium bis-dimethylamide; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2-methyl-l, 3-butadiene; • 20 (? 5-inden-1-yl) (tert-butylamido) diisopropylamidoboran titanium 2,3-dimethyl-1,3-butadiene; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium allyl; (? 5-inden-l-yl) (ert-butylamido) diisopropylamidoboran titanium? -1,4-diphenyl-1,3-butadiene; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? -2,4-hexadiene; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? 5-inden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 3-pentadiene; dichloride of (? 5-2, 3-dimet il-1-) (tert-butylamido) diisopropylamidoboran titanium; (? 5-2, 3-dimethylinden-l-yl) (ert-butylamido) diisopropylamidoboran titanium dimethyl; bis-dimethylamide of (? 5-2, 3-dimethylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium; (? 5-2, 3-dimethylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2-methyl-l, 3-butadiene; (? 5-2, 3-dimethylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2,3-dimethyl-1,3-butadiene; (? 5-2, 3-dimethylinden-1-yl) (tert-butylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; • (? 5-2, 3-dimethylinden-1-yl) (tert-butylamido) diisopropylamidoboran titanium allyl; (? 5-2, 3-dimethylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-diphenyl-1,3-butadiene; (? 5-2, 3-dimethylinden-1-yl) (tert-10 butylamido) diisopropylamidoboran titanium? -2,4- • hexadiene; (? 5-2, 3-dimet i linden-1-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; 15 (? 5-2, 3-dimethylinden-1-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? 5-2, 3-dimethylinden-1-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 3- 20 pentadiene; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium dichloride; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium dimethyl; 25 bis-dimethylamide of (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2-methyl-l, 3-butadiene; (? 5-2-pyrrolidine linden-1-yl) (tert-butylamido) diisopropylamidoboran titanium 2,3-dimethyl-1,3-butadiene; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium 2-N, N-dimethylaminobenzyl; (? 5-2-pyrrolidenylinden-l-yl) (ert-butylamido) diisopropylamidoboran titanium allyl; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-diphenyl-1,3-butadiene; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? -2,4-hexadiene; (? 5-2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; (? 5-2 -pyrrole ideni linden-1-yl) (ert-butylamido) diisopropylamidoboran titanium? 4-l-phenyl-1,3-pentadiene; (? -2-pyrrolidenylinden-l-yl) (tert-butylamido) diisopropylamidoboran titanium? 4-l, 3-pentadiene; bis-phenylamido-bis (diisopropylamido) diborium titanium dichloride; bis-phenylamido-bis (diisopropylamido) dibora titanium dimethyl; bis-dimethylamide of bis-phenylamido-bis (diisopropylamido) dibora titanium; bis-phenylamido-bis (diisopropylamido) diboran titanium 2-methyl-l, 3-butadiene; bis-phenylamido-bis (diisopropylamido) dibora titanium 2,3-dimethyl-l, 3-butadiene; bis-phenylamido-bis (diisopropylamido) diboran titanium 2-N, N-dimethylaminobenzyl; bis-phenylamido-bis (diisopropylamido) diborane allyl titanium; bis-phenylamido-bis (diisopropylamido) diboran titanium? 4-diphenyl-1,3-butadiene; bis-phenylamido-bis (diisopropylamido) diboran titanium? 4-2, -hexadiene; bis-phenylamido-bis (diisopropylamido) diboran titanium? 4-l, 4-dinaphthyl-1,3-butadiene; bis-phenylamido-bis (diisopropylamido) dibora titanium? 4-l-phenyl-1,3-pentadiene; bis-phenylamido-bis (diisopropylamido) diboran titanium? 4-l, 3-pentadiene; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diborium titanium dichloride; bis-2, ß-diisopropylphenylamido-bis (diisopropylamido) dibora titanium dimethyl; bis-dimethylamide of bis-2,6-diisopropyl-phenylamido-bis (diisopropylamido) dibora titanium; bis-2, 6-diisopropylphenylamidobis (diisopropylamido) diboran titanium 2-methyl-l, 3-butadiene; • bis-2, ß-diisopropylphenylamido-5-bis (diisopropylamido) diborane titanium 2,3-dimethyl-l, 3-butadiene; bis-2, ß-diisopropylphenylamidobis (diisopropylamido) diborium titanium 2-N, N-dimethylaminobenzyl; 10 bis-2, ß-diisopropylphenylamido- • bis (diisopropylamido) diborane allyl titanium; bis-2, β-diisopropylphenylamidobis (diisopropylamido) dibora titanium 4-l, 4-diphenyl-1,3-butadiene; 15 bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diborium titanium? 4-2, 4-hexadiene; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) dibora titanium? 4-l, 4-dinaphthyl-1,3-butadiene; • 20 bis-2,6-diisopropylphenylamido-bis (diisopropylamido) diborane titanium? 4-l-phenyl-1,3-pentadiene; bis-2, 6-diisopropylphenylamidobis (diisopropylamido) dibora titanium? 4-l, 3-25 pentadiene; dichloride of bis-3, 5-dimethylbenzylamido-bis (dimethylamido) dibora titanium; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) diboran dimethyl titanium; bis-dimethylamide of bis-3, 5-dimethylbenzylamido-bis (dimethylamido) dibora titanium; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) diborane titanium 2-methyl-l, 3-butadiene; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) diborane titanium 2,3-dimethyl-l, 3-butadiene; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) diboran titanium 2-N, N-dimethylaminobenzyl; bis-3, 5-dimethyl-yl-benzylamido-bis (dimethylamido) diborane allyl titanium; bis-3, 5-dimethyl-il-benzylamido-bis (dimethylamido) diborane titanium? 4-l, 4-diphenyl-1,3-butadiene; bis-3, 5-dimethyl-ilibenzylamido-bis (dimethylamido) diborium titanium? 4-2, 4-hexadiene; bis-3, 5-dimethyl-il-benzylamido-bis (dimethylamido) diborane titanium? 4-l, 4-dinaphthyl-1,3-butadiene; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) diborium titanium? -l-phenyl-1,3-pentadiene; bis-3, 5-dimethylbenzylamido-bis (dimethylamido) dibora titanium? 4-l, 3-pentadiene; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborium titanium dichloride; bis-2, 6-dimethybenzylamido bis (dimethylamido) dibora titanium dimethyl; 5 bis-dimethylamide of bis-2,6-dimethybenzylamido-bis (dimethylamido) dibora titanium; bis-2, ß-dimethylbenzylamido-bis (dimethylamido) diborane titanium 2-methyl-l, 3-butadiene; 10 bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborane titanium 2,3-dimethyl-l, 3-butadiene; bis-2, ß-dimethylbenzylamido-bis (dimethylamido) diborane titanium 2-N, N-dimethylaminobenzyl; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborane allyl titanium; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborane titanium? 4-l, 4-diphenyl-1, 3-? 20-butadiene; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborium titanium? 4-2, 4-hexadiene; bis-2, 6-dimethylenzylamido bis (dimethylamido) diborane titanium 4-l, 4-dinaphthyl-1, 3-butadiene; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diboran titanium? 4-l-phenyl-l, 3-pentadiene; bis-2, 6-dimethylbenzylamido-bis (dimethylamido) diborane titanium? 4-l, 3-pentadiene; bis-2, 6-diisopropylphenylamido- • bis (dimethylamido) diborium titanium dichloride; 5 bis-2,6-diisopropylphenylamidobis (dimethylamido) dibora titanium dimethyl; bis-dimethylamide bis-2,6-diisopropyl phenylamido bis (dimethylamido) dibora titanium; 10 bis-2, 6-diisopropylphenylamido- • bis (dimethylamido) diborane titanium 2-methyl-l, 3-butadiene; bis-2, 6-diisopropylphenylamido-bis (dimethylamido) diborane titanium 2,3-dimethyl-l, 3- (3-butadiene; bis-2, ß-diisopropylphenylamidobis (dimethylamido) diborane titanium 2-N, N-dimethylaminobenzyl; bis-2, ß-diisopropylphenylamido-20 bis (dimethylamido) diborane allyl titanium; bis-2, ß-diisopropylphenylamidobis (dimethylamido) diborane titanium? 4-l, 4-diphenyl-1, 3-butadiene; bis-2, 6-diisopropylphenylamido-25 bis (dimethylamido) dibora titanium? 4-2, 4-hexadiene; bis-2, ß-diisopropylphenylamido-bis (dimethylamido) diboran titanium? 4-l, 4-dinaphthyl-1, 3-butadiene; bis-2, 6-diisopropylphenylamidobis (dimethylamido) diborium titanium •? 4-l-phenyl-1,3-pentadiene; bis-2, 6-diisopropylphenylamidobis (dimethylamido) dibora titanium? 4-l, 3-pentadiene; bis-2 dichloride, ß-diisopropylphenylamidobis (bis (trimethylsilyl) amido) dibora titanium; bis-2, 6-diisopropylphenylamidobis (bis (trimethylsilyl) amido) dibora titanium dimethyl; bis-dimethylamide bis-2, 6- • diisopropylphenylatedi-bis (bis (trimethylsilyl) amido) dibora titanium; bis-2, ß-diisopropylphenylamidobis (bis (trimethylsilyl) amido) diborane titanium 2-methyl-l, 3-butadiene; bis-2, 6-diisopropylphenylamidobis (bis (trimethylsilyl) amido) diborium titanium 2,3-dimethyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido- • 20 bis (bis (trimethylsilyl) amido) diboran titanium 2-N, N-dimethylaminobenzyl; bis-2, 6-diisopropylphenylamidobis (bis (trimethylsilyl) amido) diborazole allyl; bis-2, 6-diisopropylphenylamido-25 bis (bis (trimethylsilyl) amido) diborium titanium? 4-l, 4-diphenyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (bis (trimethylsilyl) amido) diborium titanium? -2, 4-hexadiene; bis-2, 6-diisopropylphenylamido-bis (bis (trimethylsilyl) amido) diborium titanium? -1,4-dinaphthyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (bis (trimethylsilyl) amido) diboran titanium? 4-l-phenyl-1,3-pentadiene; bis-2, 6-diisopropylphenylamido-bis (bis (trimethylsilyl) amido) diborium titanium? -l, 3 pentadiene; bis-2, 6-diisopropylphenylamido dichloride bis (diisopropylamido) diboran zirconium; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium dimethyl; bis-dimethylamide of bis-2,6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium 2-methyl-1,3-butadiene; bis-2, ß-diisopropylphenylamido-bis (diisopropylamido) diborazo 2, 3-dimethyl-1,3-butadiene zirconium; bis-2, ß-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium 2-N, N-dimethylaminobenzyl; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran allyl zirconium; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium? -l, 4-diphenyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium? 4-2,4-hexadiene; bis-2, β-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium 4-l, 4-dinaphthyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium? 4-l-phenyl-1,3-pentadiene; bis-2, ß-diisopropylphenylamido-bis (diisopropylamido) diboran zirconium 4-l, 3-pentadiene; bis-2-tert-butylphenylamido bis (diisopropylamido) diborium titanium dichloride; bis-2-tert-but-ilphenylamido-bis (diisopropylamido) diboran titanium dimethyl; bis-dimethylamide of bis-2-tert-butylphenylamido-bis (diisopropylamido) dibora titanium; bis-2-ert-butylphenylamido-bis (diisopropylamido) diboran titanium 2-methyl-l, 3-butadiene; bis-2-tert-but-ylphenylamido-bis (diisopropylamido) diborane titanium 2,3-dimethyl-l, 3-butadiene; bis-2-tert-butylphenylamido-bis (diisopropylamido) dibora titanium 2-N, N-dimethylaminobenzyl; bis-2-e-t-butylphenylamido-bis (diisopropylamido) diborium titanium allyl; bis-2-tert-butylphenylamido-bis (diisopropylamido) diborium titanium 4-l, 4-diphenyl-1,3-butadiene; bis-2-tert-butylphenylamido-bis (diisopropylamido) diborium titanium? -2, 4-hexadiene; bis-2-tert-butyl-phenylamido-bis (diisopropylamido) diborium titanium 4-l, 4-dinaphthyl-1,3-butadiene; bis-2-tert-but-ylphenylamido-bis (diisopropylamido) diboran titanium? 4-l-phenyl-1,3-pentadiene; and bis-2-tert-butylpheni lamido-bis (diisopropylamido) diborium titanium? 4-l, 3-pentadiene. A further preferred class of the transition metal complexes of Group 4 of the present invention is represented in the formulas defined above 4-9 wherein, T is: including these structures where two R and R groups are joined as in pyrimidinate of 1, 3, 4, 6, 7, 8, hexahydro-pyrimido [1, 2-a], shown below: In the previous species it is believed, without being limited by this belief, that the ligand group, T, is connected to Z by the heteroatoms thereof. In the specific examples, although not limiting, of the above metal complexes included within the invention are: boran-bis-? 5-cyclopentadienyl zirconium N, N'-diisopropyl-phenyl-amidinate dichloride; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium dimethyl; boran-bis-? 5-cyclopentadienylzirconium bis-dimethylamide of N, N'-diisopropyl-phenyl-amidinate; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium 2-methyl-1,3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium 2,3-dimethyl-l, 3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium 2-N, N-dimethylaminobenzyl; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium allyl; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium? 4- l, 4-diphenyl-l, 3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium? 4-2,4-hexadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium? 4-l, 4-dinaphthyl-1,3-butadiene; N, N'-diisopropyl-phenyl-amidinate boran-bis-? 5-cyclopentadienylzirconium? 4-l-phenyl-1,3-pentadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5-cyclopentadienylzirconium? 4-l, 3-pentadiene; boran-bis-? 5-cyclopentadienyl zirconium N, N'-diisopropyl-3-phenyl-1,3-diquet imine dichloride; N, N'-diisopropyl-3-phenyl-l, 3-dikemycin borane-bis-? 5-cyclopentadienylzirconium dimethyl; boran-bis-? 5-cyclopentadienylzirconium bis-dimethylamide of N, N'-diisopropyl-3-phenyl-1,3-dikemycin; N, N'-diisopropyl-3-phenyl-l, 3-dikemycin boran-bi s -? -cyclopentadieni lcirconio 2 -methyl-l, 3-butadiene; N, N'-di and sopropi-3-phenyl-3, -di-thymine boran-bi s-? 5-cyclopentadienylzirconium 2,3-dimethyl-1,3-butadiene; N, N'-diisopropyl-3-phene 1-1,3-dikemycin borane-bis-? 5-cyclopentadienylzirconium 2-N, N-dimethylaminobenzyl; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5-cyclopentadienylzirconium allyl; N, N'-diisopropyl-3-phenyl-1,3-dikene imine borane-bis-? 5-cyclopentadienylzirconium? 4-l, 4-diphenyl-1,3-butadiene; N, N'-diisopropyl-3-phenyl-1,3-diquethymine borane-? 5-cyclopentadienylzirconium? 4-2,4-hexadiene; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5-cyclopentadienylzirconium? 4-l, 4-dinaphthyl-1,3-butadiene; N, N '-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5-cyclopentadienylzirconium? -l-phenyl-1,3-pentadiene; N, N '-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5-cyclopentadienylzirconium? ~ l, 3-pentadiene; boran-bis-? 5-cyclopentadienylzirconium N, N'-diisopropyl-dimethylguanidinate dichloride; N, N'-diisopropyl-dimethylguanidinate borane-bis-? 5-cyclopentadienylzirconium dimethyl; boran-bis-? 5-cyclopentadienylzirconium bis-dimethylamide of N, N'-diisopropyl-dimethylguanidinate; N, N'-diisopropyl-dimethylguanidinate boran, 3-bis-? 5-cyclopentadienylzirconium 2-methyl-1,3-butadiene; N, '-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylzirconium 2,3-dimethyl-l, 3-butadiene; • N, N'-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylzirconium 2-N, N-dimethylaminobenzyl; N, N'-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylcirconium allyl; N, N'-diisopropyl-dimethylguanidinate boran-10 bis-? 5-cyclopentadienylzirconium? 4_l, 4-diphenyl-l, 3-butadiene; N, N'-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylzirconium? 4-2,4-hexadiene; N, N'-diisopropyl-dimethylguanidinate borane-15 bis-? 5-cyclopentadienylzirconium? 4 l, 4-dinaphthyl-l, 3-butadiene; N, N'-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylzirconium? 4-l-phenyl-l, 3-pentadiene; • 20 N, N'-diisopropyl-dimethylguanidinate boran-bis-? 5-cyclopentadienylzirconium? 4-l, 3-pentadiene; boran-bis-? 5-inden-l-ylcirconium 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate dichloride; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? inden-1-ylkythio dimethyl; boran-bis-? inden-1-ylchirconium bis-dimethylamide of 1, 3, 4, 6, 7, 8-hexahydro-pyrimido [1,2-a] pyrimidinate; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium 2-methyl-1,3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium 2,3-dimethyl-1,3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium 2-N, N-dimethylaminobenzyl; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate borane-bis-? 5-inden-l-ylcirconium allyl; 1,3,4,6,7,8-Hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium? -l, 4-diphenyl-1,3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium? 4-2,4-hexadiene; 1, 3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium? -l, 4-dinaphthyl-1,3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium? 4-l-phenyl-1,3-pentadiene; 1,3,4,6,7,8-hexahydro-pyrimido [1,2-a] pyrimidinate boran-bis-? 5-inden-l-ylcirconium? 4-l, 3-pentadiene; boran-bis-? 5- (2-methylinden-l-yl) zirconium N, N'-diisopropyl-phenyl-amidinate dichloride; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-1-yl) zirconium dimethyl; boran-bis-? 5- (2-methylinden-l-yl) zirconium bis-dimethylamide of N, N'-diisopropyl-phenyl-amidinate; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-l-yl) zirconium 2-methyl-l, 3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-l-yl) zirconium 2,3-dimethyl-l, 3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-1-yl) zirconium 2-N, redimeti laminobenzyl; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-met i linden-1-yl) zirconium allyl; N, β-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene; N, N'-Diisopropyl-phenyl-amidinate boran-bis-? 5- (2-methylinden-l-yl) zirconium? -2,4-hexadiene; N, N'-diisopropyl-phenyl-amidinate boran-bis-? 5- (2-methylinden-l-yl) zirconium? 4-l, 4-dinaphthyl-l, 3-butadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methylidene-1-yl) zirconium? 4-l, 3-pentadiene; boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate dichloride; N, N 1 -bis-2, 6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium dimethyl; boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) -zirconium-bis-dimethylamide of N, N'-bis-2,6-diisopropyl-phenyl-1-phenyl-amidinate; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-l, 3-butadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1, 3-butadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-2,4-hexadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium? -l, 4-dinaphthyl-1,3-butadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium? -l-phenyl-1,3-pentadiene; N, N'-bis-2,6-diisopropylphenyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium? -l, 3-pentadiene; N, N'-bis-2,6-diisopropyl-phenyl-3-methyl-l, 3-diquethymine boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium dichloride; N, N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium dimethyl; boran-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) -zirconium-bis-dimethylamide of N, N'-bis-2,6-diisopropyl-phenyl-3-methyl-1,3-dikemycin; N, N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium 2-methyl-1,3-diol -butadiene; N, N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1 , 3-butadiene; N, N'-bis-2,6-diisopropyl-phenyl-3-methyl-1,3-diquethymine boran-bis-? 5 (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; • N, N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; N, N'-bis-2,6-diisopropyl-phenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4- diphenyl-l, 3-butadiene; N, N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-2, 4 - hexadiene; N, N'-bis-2,6-diisopropylphenyl-3-methyl-1-, 3-dikemycin borane-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium? 4-l, 4- dynaphthyl-l, 3-butadiene; N, N? -bis-2, 6-diisopropylphenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1, 3- pentadiene; N, N'-bis-2,6-diisopropyl-phenyl-3-methyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -l, 3-pentadiene; bis (N, N '-diisopropyl-phenyl-amidinate) diborane-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dichloride; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-1,2-bis-? 5- (2-methyl-1-4-phenylinden-1-yl) zirconium dimethyl; bis (N, N '-diisopropyl-phenyl-amidinate) bis-dimethylamide dibor-1,2-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-l, 2-bis-? 5- (2-methyl-il-4-phenylinden-1-yl) zirconium 2-methyl-1,3-butadiene; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-1,2-bis-? 5- (2-methyl-1-4-phenylinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; bis (N, N '-diisopropyl-phenyl-amidinate) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-l, 2-bis-? 5- (2-met-il-4-phenylinden-1-yl) zirconium allyl; bis (N, N'-diisopropyl-phenyl-ami-nato) diboran-l, 2-b? s-? 5- (2-met-il-4-phenyl-1-yl) zirconium? 4-l, 4- diphenyl-l, 3-butadiene; bis (N, N'-diisopropyl-phenyl-amdinate) diboran-l, 2-bis-? 5- (2-methyl-4-phenylene-1-yl) zirconium? -2, 4-hexadiene; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-l, 2-bis-? 5- (2-met il-4-phenylinden-l-yl) zirconium? -l, 4-dinaphthyl-l, 3-butadiene; bis (N, N'-diisopropyl-phenyl-amidinate) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl-1,3-pentadiene; bis (N, N '-diisopropyl-phenyl-amidinate) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 3-pentadiene; bis (N, N '-diisopropyl-3-phenyl-1,3-dihettimine) diborane-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium dichloride; bis (N, N'-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1, 2-bis? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium dimethyl; Bis (dimethylamide) bis (N, N '-diisopropyl-3-phenyl-1,3-diketimine) diboran-1,2-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium; bis (N, N'-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1, 2-bis-? 5- (2-methyl-4-phenyl-inden-1-yl) zirconium 2-methyl-1, 3-butadiene; bis (N, N'-diisopropyl-3-phenyl-1,3-dikemycin) diboran-1,2-bis-? 5- (2-methy1-4-phenylinden-1-yl) zirconium 2,3-dimethyl- 1, 3-butadiene; bis (N, N'-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium 2-N, N- dimethylaminobenzyl; bis (N, N '-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium allyl; bis (N, N'-diisopropyl-3-phenyl-1,3-dikemycin) diboran-l, 2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4 -diphenyl-1, 3-butadiene; bis (N, N'-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-2, 4 -hexadiene; bis (N, N'-diisopropyl-3-phenyl-1, 3-dikemycin) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4 -dinaphthyl-l, 3-butadiene; bis (N, N'-diisopropyl-3-phenyl-l, 3-dikemycin) diboran-1,2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l-phenyl -l, 3-pentadiene; bis (N, N '-diisopropyl-3-phenyl-1,3-dikemycin) diboran-1, 2-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 3 -pentadiene; N, N'-diisopropyl-phenyl-amidinate dichloride boran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium; N, N'-diisopropyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium dimethyl; bis-dimethylamide of N, N'-diisopropyl-phenyl-amidinate boran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2-methyl-1,3-butadiene; N, β-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methyl-1-4 -naphthinden-1-yl (zirconium 2,3-dimethyl-1,3-butadiene; N, N'-diisopropyl-phenyl) -amidinate boran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2-N, N-dimethylaminobenzyl; N, N'-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium allyl; N, N'-diisopropyl-phenyl-amidinate boran-bis- I - (2-methi 1-4 -naphthylinden-1-yl) zirconium 4-l, 4-diphenyl-1,3-butadiene; N, β-diisopropyl-phenyl-amidinate borane-bis-? 5- (2-methi-1-4 -naphthylinden-1-yl) zirconium? 4-2, 4-hexadiene; N, N'-Diisopropyl-phenyl-amidinate boran-bis-ils- (2-methyl-4-naphthinin-1-yl (zirconium? 4-l, 4-dinaphthyl-1,3-butadiene; N, N ' -diisopropyl-phenyl-amidinate boran-bis-? 5- (2-met il-4-naphthinden-l-yl) zirconium 1-phenyl-1,3-pentadiene; N, N'-diisopropyl-phenyl-amidinate boran- bis-? 5- (2-methi 1-4 -naphthinden-1-yl) zirconium? 4-l, 3-pentadiene; N, N'-diisopropyl-3-phenyl-1,3-diquethimine dichloride boran-bis -? 5- (2-methyl-4-naphthinin-1-yl) zirconium; N, N'-diisopropyl-3-phenyl-l, 3-dikemycin boran-bis-? 5- (2-met il-4) -naft i linden-1-yl) zirconium dimethyl; N, N'-diisopropyl-3-phenyl-1,3-dikemycin bis-dimethylamine boran-bis-? 5- (2-methyl-4-naphthylinden-1-) il) zirconium; N, N'-diisopropyl-3-phenyl-1, 3-dikemycin borane-bis-? - (2-methyl-4-naphthinden-1-yl) zirconium 2-methyl-1,3-butadiene; N, N'-Diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-1,4-naphthinden-1-yl) zirconium 2,3-dimethyl-1,3-butadiene; N , N'-diisopropyl-3-phenyl-l, 3-d iquetimine boran-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium 2-N, -dimethylaminobenzyl; N, N '-diisopropyl-3-phenyl-1,3-diquethymine borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium allyl; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium? 1,4-d? Phen? L-l, 3-butadiene; N, N * -diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium -2,4-hexadiene; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-naphthylinden-1-yl) zirconium? -1,4-dinaphthyl-l, 3-butadiene; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-naphthinden-1-yl) zirconium? 4-1-phenyl-1,3-pentadiene; N, N'-diisopropyl-3-phenyl-1,3-dikemycin borane-bis-? 5- (2-methyl-4-naphthinden-1-yl) zirconium? 4-1,3-pentadiene; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium titanium dichloride; bis-2, 6-diisopropylphenylamido-bis (N, N '-diisopropyl-phenyl-amidinate) dibora titanium dimethyl; Bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) bis-dimethylamide dibora titanium; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborane titanium 2-methyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diboran titanium 2,3-dimethyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium 2-N, N-dimethylaminobenzyl titanium; bis-2, ß-diisopropylphenylamido-bis (N, N '-diisopropyl-phenyl-amidinate) diborium allyl titanium; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium titanium? 4-l, 4-diphenyl-1,3-butadiene; 'bis-2, 6-diisopropylphenylamido-bis (N, N' -diisopropyl-phenyl-amidinate) diboran titanium? 4-2,4-hexadiene; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium titanium? 4-l, 4-dinaphthyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium titanium? 4-l-phenyl-1,3-pentadiene; bis-2, 6-dii sopropilphenylamido-bis (N, N'-diisopropyl-phenyl-amidinate) diborium titanium? -1,3- pentadiene; bis-2, 6-diisopropylphenylamido-5 bis (N, N'-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium dichloride; bis-2, 6-di isopropylphenylamido-bis (N, N'-diisopropyl-3-phenyl-1,3-dikemycin) diboradimethyl titanium; 10 bis-dimethylamide of bis-2,6-di-i-propylphenylamido-bis (N, N'-diisopropyl-3-phenyl- • 1,3-diketimine) dibora titanium; bis-2, 6-di isopropylphenylamido-bis (N, N'-diisopropyl-3-phenyl-l, 3-dikemycin) diborane titanium 15 2-methyl-l, 3-butadiene; bis-2, 6-dii-sopro-phenyl-phenylamido-bis (N, '-diisopropyl-3-phenyl-1,3-diketimine) diborium 2,3-dimethyl-1,3-butadiene titanium; bis-2, 6-diisopropylphenylamido-bis (N, '- • 20-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium 2-N, N-dimethylaminobenzyl; bis-2, 6-diisopropylphenylamido-bis (N, N'-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium allyl; 25 bis-2, 6-di-i-propylphenylamido-bis (N, '-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium? 4-l, 4-diphenyl-l, 3-butadiene; bis-2, 6-di isopropylphenylamido-bis (N, N'-diisopropyl-3-phenyl-1,3-diquet imine) diboran titanium? 4-2, 4-hexadiene; bis-2, 6-diisopropylphenylamido-bis (N, '-diisopropyl-3-phenyl-l, 3-dikemycin) diborium titanium? ~ 1, 4-dinaphthyl-1,3-butadiene; bis-2, 6-diisopropylphenylamido-bis (N, N '-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium? 4-l-phenyl-1,3-pentadiene; and bis-2,6-di-propylphenylamido-bis (N, N'-diisopropyl-3-phenyl-1,3-diketimine) diborium titanium? 4-l, 3-pentadiene. The skilled person will recognize that additional members of the above list, such as those in which boron is replaced with aluminum, are also included within the invention. In addition, it should also be recognized that the terms "5" or "4" may not accurately reflect the current electronic distribution of the molecule under conditions of use and that molecules that include smaller numbers of contributing atoms for electronic movement are also intended include within this description. The most preferred metal complexes for use herein are: dimethylamidoboran-bis (? 5-cyclopentadienyl) zirconium dichloride, dimethylamidoboran-bis (? 5-inden-1-yl) zirconium dichloride, dimethylamidoboran-bis (d?) Dichloride -2-methyl-4-phenyl-inden-1-yl) zirconium, dimethylamidoboran-bis (? -ethyl-4-phenylinden-l-yl) zirconium dichloride, dimethylamidoboran-bis (? 5-2- isopropyl-4-dichloride) fenilinden-1-yl) zirconium, dichloride of • dimethylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium, dimethylamidoboran-bis (? 5-3-t-butylinden-l-yl) dichloride zirconium, diisopropylamidoboran-bis (? -cyclopentadienyl) zirconium dichloride, diisopropylamidoboran-bis (? 5-inden-1-yl) zirconium dichloride, diisopropylamidoboran-bis (? 5-2-methyl-4-phenyl-indenium dichloride) 1-il) zirconium, dichloride • diisopropylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium, diisopropylamidoboran-bis (? 5-2-isopropyl-4-phenylinden-1-yl) zirconium dichloride, diisopropylamidoboran dichloride bis (? 5-2-methyl-4- bis (3,5-trifluoromethyl) phenylinden-1-yl) zirconium, diisopropylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium dichloride, dichloride diphenylamidoboran-bis (? 5- 20 cyclopentadienyl) zirconium, diphenylamidoboran-bis- (? 5-inden-1-yl) zirconium dichloride, di-phenylamidoboran-bis- (? -2-methyl-4-phenylinden-1-dichloride) il) zirconium, diphenylamidoboran-bis (? 5-ethyl-4-phenylinden-1-yl) zirconium dichloride, diphenylamidoboran-bis (? 5- isopropyl-4-phenylinden-1-yl) zirconium dichloride, diphenylamidoboran dichloride -bis (? 5-2-methyl-4-bis (3, 5-trifluoromethyl) phenyl-inden-1-yl) zirconium, diphenylamidoboran-bis (? 5-t-butylinden-1-yl) zirconium dichloride, dimethylamidoboran-bis (? 5-cyclopentadienyl) • zirconium l, 4-diphenyl-l, 3-butadiene, dimethylamidoboran-bis (? 5-inden-l-yl) zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoboran-bis (? 5-2-methyl) 4-phenylinden-l-yl) zirconium l, 4-diphenyl-l, 3-butadiene, dimethylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-1, 3-butadiene, dimethylamidoboran-bis (? 5-2-isopropyl-4-phenylinden-l- • il) zirconium l, 4-diphenyl-1,3-butadiene, dimethylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 1,4-diphenyl- 1,3-butadiene, dimethylamidoboran-bis (? 5-3-t-15-butylinden-l-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diisopropylamidoboran-bis (? -cyclopentadienyl) zirconium 1, 4 -diphenyl-l, 3-butadiene, diisopropylamidoboran-bis (? 5-inden-l-yl) zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-2- 20 methyl-4-phenylinden -l-il) zirconium 1,4-diphenyl-l, 3-butadiene, diisopropylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diisopropylamidoboran-bis (? 5-2-isopropyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diisopropylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 1, -diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-3-t) - butylinden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (β-cyclopentadienyl) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (γ-5-indenide) l-il) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (? 5-2-methyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diphenylamidoboran -bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (? 5-2-isopropyl-4-phenylinden-1-yl) zirconium 1, 4-diphenyl-l, 3-butadiene, diphenylamidoboran-bis (? 5-methyl-4-bis (3, 5- • trifluoromethyl) phenyl-inden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, or diphenylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium 1,4-diphenyl-3, -butadiene. In general, the complexes of the invention Current can be prepared by first converting the ligands represented in the formulas la and 2a to a dianion salt (where R4 is H) via the reaction with a Grignard reagent of alkyl-lithium or an alkali metal hydride such as NaH or KH The derivative of The dianionic ligand is then reacted with a metal complex precursor such as MY3, MY33 or MY32 (and the corresponding Lewis base adducts), wherein Y3 is defined as above. Alternatively, the reactions can be used which use the neutral ligand, wherein R4 is hydrogen, in combination with the metal precursors M (NR32) or MR3 these reactions are carried out in an inert solvent such as a hydrocarbon solvent or an ethereal solvent in the temperature range from -100 ° to 150 ° C. An especially useful metal complex precursor reagent corresponds to formula 3: Formula 3 wherein, M is zirconium, R1 and LB are as defined above and Y3 in each event is chloride. The use of this precursor in the reaction with ligands of this invention causes the metal complex to result in high racemic purity, which is especially useful in the stereospecific polymerization of o-olefins. Alternatively, where R4 in the structures of the formulas la and 2a is a trimethylsilyl group, the ligand can be reacted directly with any of the above metal complex precursors of the formula 3, employing similar reaction conditions. The recovery of the desired Group 4 transition metal complex is carried out by separating the product from any alkali metal or alkaline earth metal salts and devolatilizing the reaction medium. If desired, extraction can be employed in a secondary solvent. Alternatively, if the desired product is an insoluble precipitate, filtration or other separation techniques may be employed. The final purification, if required, can be carried out by recrystallization of an inert solvent, which employs low temperatures if necessary. The complexes are made catalytically active by combination with activating co-catalysts or the use of activation techniques previously known in the art for use with the olefin polymerization complexes of Group 4 metal. The activating co-catalysts suitable for used herein include: polymeric or oligomeric alumoxanes, especially methylalumoxane, methylalumoxane modified with triisobutyl aluminum or isobutyl alumoxane; neutral Lewis acids, such as, for example, the Group 13 compounds substituted with C? -3o hydrocarbyl, especially the tri (hydrocarbyl) aluminum or tri (hydrocarbyl) boron compounds and halogenated derivatives thereof (among which are included) perhalogenates), having 1 to 10 carbon atoms in each hydrocarbyl or halogenated hydrocarbyl group, more especially tri (aryl) boron perfluorinated compounds more especially tris (pentafluro-phenyl) borane; non-coordinating, compatible, non-polymeric ion-forming compounds (including the use of these compounds under oxidation conditions) in particular the use of noncoordinating, compatible anion salts of ammonium, phosphonium, oxonium, carbonium, silylium, or sulfonium, or salts of compatible non-coordinating anions of ferrocenium; volumetric electrolysis explained in more detail below); and combinations of activating cocatalysts and prior techniques. The above activating cocatalysts and activation techniques have been previously taught with respect to different metal complexes in the following references: EP-A-277, 003, US-A-5, 153, 157, US-A-5, 064, 802, US-A-5,321,106, US-A-5, 721, 185, US-A-5, 350, 723, US-A-5,425,872, US-A-5, 625, 087, US-A-5, 883, 204, US-A-5,919,983, USA-5, 783, 512, WO 99/15534, and USSN 09 / 251,664, filed February 17, 1999. Neutral Lewis acid combinations, especially the combination of a trialkylaluminum compound having from 1 to 4 carbon atoms in each alkyl group and a halogenated tri (hydrocarbyl) boron compound having from 1 to 20 carbon atoms in each hydrocarbyl group, especially tris (pentafluorophenyl) borane, additional combinations of mixtures of neutral Lewis acid with a polymeric or oligomeric alumoxane and combinations of an individual neutral Lewis acid, especially tris (pentaflurophenyl) borane with an alu Polymeric or oligomeric moxane, are especially desirable co-catalysts activators. Preferred molar proportions of the Group 4 metal complex: tris (pentafluoro-phenylborane: alumoxane) are from 1: 1: 1 to 1:10:30, most preferably from 1: 1: 1.5 to 1: 5: 10. Suitable ion forming compounds useful as co-catalysts in one embodiment of the present invention comprise a cation which is a Bronsted acid capable of donating a proton and an anion not compatible coordinator, A. "In the sense in which • used herein, the term "non-coordinating" means that an anion or substance that is not coordinated with the Group 4 metal containing the precursor complex and the catalyst derived from the The same or only weakly combines these complexes with which it remains sufficiently labile to be displaced by a neutral Lewis base. A non-coordinating anion especially refers to an anion that when it is functioning as an anion of • Load balancing in a cationic metal complex, does not transfer an anionic substituent or fragment thereof to the cation, thereby forming neutral complexes. "Compatible anions" are anions that do not degrade to neutrality when the complex The initially formed is decomposed and does not interfere with the desired subsequent polymerization or other uses of the complex. The preferred anions are those that containing a simple coordination complex comprising a charge-bearing metal or metalloid core, the anion is capable of balancing the charge of the active catalyst species (the metal cation) that can be formed when the two components are combined. Also, the anion must be sufficiently labile to be displaced by olefinic, diolefinic and acetylenically unsaturated compounds or other Lewis bases neutral such as, for example, ethers or nitriles. fl Suitable metals include, but are not limited to: aluminum, gold and platinum. Suitable metalloids include, but are not limited to: boron, phosphorus and silicon. The compounds it contains anions and which comprise coordination complexes and which additionally contain a simple metal or metalloid atom are, of course, well known and particularly many of these compounds which contains a simple boron atom in the portion anionic, are commercially available. Preferably, these catalysts can be represented by the following general formula: (L * -H) d + (A) where: L * is a neutral Lewis base; (L * -H) + is a conjugated Bronsted acid of L *; Ad ~ is a non-coordinating compatible anion that has a charge of d "and d in an integer from 1 to 3. Most preferably, Ad" corresponds to the formula: [M'Q] ~; wherein: M 'is boron or aluminum in the formal oxidation state +3; and Q independently in each event is selected from hydride, dialkylamido, halide, hydrocarbyl, hydrocarbyl oxide, halo substituted hydrocarbyl, halo substituted hydrocarbyloxy, and halo substituted hydrocarbyl radicals (including hydrocarbyl perhalogenated hydrocarbyloxy perhalogenated hydrocarbyl radicals) and perhalogenated silylhydrocarbyl), the Q group has up to 20 carbon atoms with the proviso that it does not occur more than once in the Q halide. Examples of suitable hydrocarbyl oxide Q groups are set forth in U.S. Pat. No. 5,296,433. In a more preferred embodiment, d is one, that is, the counter ion has a simple negative charge and is A "The activating co-catalysts comprising boron that are particularly useful in the preparation of the catalysts of this invention can be represented by the following general formula: (L * -H) + (BQ4) ~; where: L * is as previously defined; B is boron in a formal oxidation state of 3; and Q is a hydrocarbyl, hydrocarbyloxy, fluorinated hydrocarbyl, fluorinated hydrocarbyloxy or fluorinated silylhydrocarbyl group of up to 20 atoms without Hydrogen, with the proviso that on no more than one occasion is hydrocarbyl Q. • The preferred Lewis base salts are ammonium salts, more preferably trialkylammonium salts containing one or more groups C.sub.2 2-4o alkyl. Most preferably, Q in each occurrence is a fluorinated aryl group, especially a pentafluorophenyl group. Illustratively and without limitation, examples of the boron compounds that can be used as an activating co-catalyst in the preparation of the improved catalysts of this invention are: tri-substituted ammonium salts such as for example: trimethyl ammonium tetrakis (pentafluorophenyl) borate, trimethyl ammonium tetrakis (pentafluorophenyl) borate, tetrakis (pentafluorophenyl) borate trimethylammonium, tetrakis (pentafluorophenyl) borate tri (n-butyl) ammonium, tetrakis (pentafluorophenyl) borate tri (sec-butyl) ammonium, tetrakis (pentafluorophenyl) borate N, N-dimethylanilinium, n-butyltris N, N-dimethylanilinium (pentafluorophenyl) borate, benzyltris (pentafluorophenyl) borate of N, N-dimethylanilinium, tetrakis (4- (t-butyldimethylsilyl) -2, 3, 5, 6-tetrafluorophenyl) borate of N, N- dimethylanilinium, tetrakis (4- (triisopropylsilyl) -2, 3, 5, 6-tetrafluorophenyl) borate of N, N-dimethylanilinium, pentafluorofenoxitris (pentafluorophenyl) borate N, N-dimethylanilinium, N, N-diethylanilinium tetrakis (pentafluorophenyl) borate, tetrakis (pentafluorophenyl) borate of N, N-dimethyl-2,4,6-trimethylanilinium, tet rakis (pentafluorophenyl) borate of dimethyltetradecylammonium, tet rakis ( pentafluorophenyl) borate of dimethylhexadecylammonium, tetrakis (pentafluorophenyl) borate of dimethyloctadecylammonium, tetrakis (pentafluorophenyl) borate of metilditetradecylammonium, (hydroxyphenyl) tris (pentafluorophenyl) borate of metilditetradecylammonium, (diethylaluminoxyphenyl) tris (pentafluorophenyl) borate • of methylditetradecylammonium, tetrakis (pentafluorophenyl) borate methyldihexadecylammonium, (hydroxyphenyl) tris (pentafluorophenyl) borate methyldihexadecylammonium, (diethylaluminoxyphenyl) tris (pentafluorophenyl) borate -methyldihexadecylammonium, • methyldioctadecylammonium tetrakis (pentafluorophenyl) borate, methyldioctadecylammonium (hydroxyphenyl) tris pentafluorophenyl) borate, methyldioctadecylammonium (diethylaluminoxyphenyl) tris pentafluorophenyl) borate, mixtures of the above, dialkylammonium salts such as for example: tetrakis (pentafluorophenyl) di- (i- • 20-propyl) ammonium borate, methylcyclodecylammonium tetrakis (pentafluorophenyl) borate, methylcyclodecylammonium tetrakis (pentafluorophenyl) borate, and dioctadecylammonium tetrakis (pentafluorophenyl) borate; tri-substituted phosphonium salts such as for example: triphenylphosphonium tetrakis (pentafluorophenyl) borate, methyldioctadecylphosphonium tetrakis (pentafluorophenyl) borate, and tri (2,6-dimethylphenyl) phosphonium tetrakis (pentafluorophenyl) borate; di-substituted oxonium salts such as for example: diphenyloxonium tetrakis (pentafluorophenyl) borate, di (o-tolyl) oxonium tetrakis (pentafluorophenyl) borate, and di (octadecyl) oxonium tetrakis (pentafluorophenyl) borate; di-substituted sulfonium salts such as for example: tetrakis (pentafluorophenyl) borate di (o-tolyl) sulfonium, and tetrakis (pentafluorophenyl) borate methylcotedecylsufonium. The preferred cations (L * -H) + are methyldioctadecylammonium and dimethyloctadecylammonium. Another suitable ion-forming, activating catalyst comprises a salt of a cationic oxidizing agent and a compatible, non-coordinating anion represented by the formula: (Oxe t) d (Aa-) e. where : Oxe + is a cationic oxidizing agent that has a charge of e +; e is an integer from 1 to 3; and Ad ~ and d are as previously defined. Examples of cationic oxidation agents include: ferrocenium, ferrocenium substituted with hydrocarbyl, Ag + or Pb + 2. The preferred embodiments of Ad "are those anions previously defined with respect to Bronsted acid containing activating cocatalysts, especially • tetrakis (pentafluorophenyl) borate. Another suitable ion-forming activating catalyst comprises a compound which is a salt of a carbenium ion and a compatible anion, coordinator represented by the formula: © + A "where: © + is a carbenium ion C? -2o; and? 20 A" is as previously defined. A preferred carbenium ion is the trityl cation, which is triphenylmethylium. An additional and suitable ion activating cocatalyst comprises a compound which is a silylium ion salt and a non-coordinating, compatible anion represented by the formula: R3 S? (X ') q + A ~ where: R is hydrocarbyl C _-_ and X, q and A "are as previously defined. The salt activating co-catalysts of Preferred silyliums are trimethylsilyl tetrakispentafluorophenylborate, triethylsilyl tetrakispentafluorophenylborate and ether-substituted adducts thereof. Silylium salts have been previously described generically in J. Chem Soc. Chem. Comm., 1993, 383-384, as well as in Lambert, J. B., et. al., Organometallics, 1994, 13, 2430-2443. The use of • the above silylium salts as activating co-catalysts for the addition polymerization catalysts is disclosed in U.S. Application Serial No. 304,314, filed on December 12, September 15, 1994, published in the equivalent format as WO 96/08519 on March 21, 1996. Certain complexes of alcohols, mercaptans, • silanols and oximes with tris (pentafluorophenyl) borane are also effective catalyst activators and can be used in accordance with the present invention. These co-catalysts are disclosed in USP 5,296,433. Another class of suitable catalyst activators are expanded anionic compounds which correspond to the formula: (A + a) b- (Z J 31) ~ c d1, wherein: A1 is a charge cation -t-a1, Z1 is an anionic group between 1 and 50, preferably 1 to 30 atoms, not counting the hydrogen atoms, further contains two or more Lewis base sites; J1 independently in each event is a Lewis acid coordinated to at least one Lewis base site of Z1, and optionally two or more of these groups J1 can be joined together in an entity having a multiple Lewis acid functional group, j1 is a number from 2 to 12 and a1, b1, c1 and d1 are integers from 1 to 3, with the proviso that a1 x b1 is equal to c1 x d1. The above co-catalysts (illustrated by those having anions imidazolide, substituted imidazolide, imidazolinide, substituted imidazolinide, benzimidazolide or substituted benzimidazolide) can be represented schematically as follows: wherein: A1 + is a monovalent cation as defined above and is preferably a cation of trihydrocarbyl ammonium, which contains one or more C? 0-alkyl groups, especially the methylbis (tetradecyl) ammonium or methylisobis (octadecyl) cation ammonium, R8, independently in each event, is hydrogen or a halo, hydrocarbyl, halocarbyl, halohydrocarbyl, silylhydrocarbyl, or silyl (including mono, di and tri (hydrocarbyl) silyl) of up to 30 atoms not counting hydrogen, preferably C_-2o alkyl, and J1 is (pentafluorophenyl) borane or tris (pentafluorophenyl) aluminan.

Examples of these catalyst activators include the trihydrocarbylammonium salts, especially methylbis (tetradecyl) ammonium or methylbis (octadecyl) ammonium: bis (tris (pentafluorophenyl) borane) imidazolide, bis (tris (pentafluorophenyl) borane) - 2 - undecylamide zolid, bis (tris (pentafluorophenyl) borane) - 2 - heptadecyl imide zol ida, • 20 bis (tris (pentafluorophenyl) borane) -4, 5- bis (undecyl) imidazolide, bis (tris (pentafluorophenyl) borane) -4 , 5- bis (heptadecyl) imidazolide, bis (tris (pentafluorophenyl) borane) imidazolinide, 25 bis (tris (pentafluorophenyl) borane) -2- undecylimidazolinide, bis (tris (pentafluorophenyl) borane) -2- heptadecylimidazolinide, bis (tris ( pentafluorophenyl) borane) -4,5-bis (undecyl) imidazolinide, bis (tris (pentafluorophenyl) borane) -4,5-bis (heptadecyl) imidazolinide, bis (tris (pentafluorophenyl) borane) -5,6-dimethylbenzimidazolide, bis (tris (pentafluorophenyl) borane) -5,6-bis (undecyl) benzimidazolide, bis (tris (p. entafluorophenyl) aluman) imidazolide, bis (tris (pentafluorophenyl) aluman) -2-undecyl imide zol ida, bis (tris (pentafluorophenyl) aluman) -2-heptadecyl imidazolide, bis (tris (pentafluorophenyl) aluman) -4,5-bis ( undecyl) imidazolide, bis (tris (pentafluorophenyl) aluman) -4,5-bis (heptadecyl) imidazolide, bis (tris (pentafluorophenyl) aluman) imidazolinide, bis (tris (pentafluorophenyl) aluman) -2-undecylimidazolinide, bis (tris (pentafluorophenyl) aluman) -2-heptadecylimidazolinide, bis (tris (pentafluorophenyl) aluman) -4, 5- bis (undecyl) imidazolinide, bis (tris (pentafluorophenyl) aluman) -4,5-bis (heptadecyl) imidazolinide, bis (tris (pentafluorophenyl) aluman) -5,6-dimethylbenzimidazolide, bis (tris (pentafluorophenyl) aluman) -5 , 6- bis (undecyl) benzimidazolide. The molar ratio of catalyst / co-catalyst used preferably varies from 1: 10,000 5 to 100: 1, more preferably from 1: 5000 to 10: 1, most preferably from 1: 1000 to 1: 1. Alumoxane, when used in itself as an activating co-catalyst, is used in large quantities, generally at least 100 times the amount of the metal complex on a molar basis. The tris (pentafluorophenyl) borane, when used as an activating co-catalyst, is employed in a molar ratio to the metal complex of 0.5: 1 to 10: 1, more preferably 1: 1 to 6: 1, with the highest preference from 1: 1 to 5: 1. The remaining activating co-catalysts are generally employed in a molar ratio to the metal complex of 0.9: 1 to 3: 1 and preferably in approximately an equimolar amount with the metal complex, is • 20 say, from 1.1 to 1.5: 1. The catalyst composition can be prepared and used as a heterogeneous catalyst by chemically absorbing, depositing or binding the required components onto a particulate solid inorganic or organic, inert. Examples of these solids include silica, silica gel, alumina, clays, expanded clays (aerogels), trialkylaluminum compound aluminosilicates and organic or inorganic polymeric materials, especially polyolefins. In a preferred embodiment, a heterogeneous catalyst is prepared by reacting an inorganic compound, preferably a tri (C? 4) aluminum compound, with an activating cocatalyst, especially an ammonium salt of an oxyaryl (trispenta-fluorophenyl) borate, such as an ammonium salt of (4-hydroxy-3, 5-ditertiarybutylphenyl) tris- (pentafluorophenyl) borate or (4-hydroxyphenyl) -tris (pentafluorophenyl) borate. East • activating co-catalyst is deposited on the support when coprecipitating, absorbing, spraying or a similar technique and eliminating any solvent or diluent. The metal complex is added to The support also absorbs, deposits or chemically bonds the same to the support, either subsequently, simultaneously or before the addition of the activating co-catalyst. The catalysts, preferably supported • By any of the above methods, unsaturated monomers having from 2 to 8 carbon atoms either alone or in combination in the gas phase can be used to polymerize ethylenically and / or acetylenically. The preferred monomers include the C2-6 α-olefins especially ethylene, propylene, isobutylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-pentene, 4-methyl-1-pentene and mixtures thereof. Other preferred monomers include 1,3-butadiene ethylidenebornene and mixtures thereof. Preferred monomers include ethylene or a mixture of C2_6 α-olefins. Long-chain macromolecular α-olefins are vinyl-terminated polymeric remnants formed in-itself, especially during continuous or semi-continuous polymerization reactions. Under suitable processing conditions, the long chain macromolecular units are readily polymerized in the polymeric product together with ethylene and other short chain olefin monomers to provide small amounts of long chain branching into the resulting polymer. These polymers possess improved rheological properties, especially improved extrusion characteristics compared to polymers that contain a relatively minor long chain branching. An analytical measurement that can indicate the presence of a long chain branching in an olefin polymer is the presence of a high 110/12 or a high 121/12 value, while having a narrow molecular weight distribution as determined by Mw. / Mn, compared to polymers that do not have long chain branching. Preferred are polymers having Mw / Mn of less than 3.5, especially less than 3.0, especially less than 2.8 and 110/12 greater than 10, preferably greater than 20, more preferably greater than 30.

In general, the polymerization can be carried out under conditions well known in the art for gas phase polymerization reactions, ie, temperatures of 0-250 ° C, preferably 60 to 150 ° C, more preferably from 70 to 110 ° C and atmospheric pressures of 10,000 atmospheres. A support, in particular silica, alumina or a polymer (especially poly (tetrafluoroethylene) or a polyolefin) and desirable way is used to obtain a morphology • Polymeric particulate, desired. The support is preferably used in an amount to provide a weight ratio of catalyst (based on the metal): support from 1: 100,000 to 1:10, most preferably from 1: 50,000 to 1:20 and most preferably from 1: 10,000 to 1:30. Beyond the polymerization reactions, the molar ratio of catalyst: polymerizable compounds employed is 10"12: 1 to 10-1: 1, more preferably 10" 9: 1 to • 20 10"5: 1. In all cases, the individual ingredients as well as the recovered catalyst components must be protected from oxygen and moisture.

The catalyst and the catalysts must be prepared and recovered in an atmosphere free of oxygen and moisture. Preferably, therefore, the reactions are carried out in the presence of a dry inert gas such as, for example, nitrogen. The gaseous phase processes for the polymerization of olefins, in particular the homopolymerization and copolymerization of ethylene and propylene and the copolymerization of ethylene with higher α-olefins are known in the art. The polymerization can be carried out as a batch or continuous polymerization process. A continuous process is preferred, in which case the catalyst, ethylene, comonomer and optionally the solvent are continuously fed to the reaction zone and the polymer product is continuously removed or intermittently removed. The gaseous phase process employed can be, for example, of the type employing a mechanically stirred bed or a gas fluidized bed as the polymerization reaction zone. The process is preferred in which the polymerization reaction is carried out in a vertical cylindrical polymerization reactor, containing a fluidized bed of polymer particles supported above a perforated plate, the fluidization grid, by a gas flow of fluidization. Cooling of the reactor can be provided by the use of recycled gas, which is fed as a volatile liquid to the bed to provide an evaporative cooling effect.

The volatile liquid used in this case may be, for example, a volatile inert liquid, for example, a saturated hydrocarbon having from 3 to 8, preferably from 4 to 6, carbon atoms. In the event that the monomer or comonomer itself is a volatile liquid (or can be condensed to provide this liquid) it can be fed to the bed to provide an evaporative cooling effect. The volatile liquid evaporates in the hot fluidized bed to form gas that mixes with the fluidizing gas. If the volatile liquid is a monomer or comonomer, it will undergo some polymerization in the bed. The evaporated liquid then emerges from the reactor as part of the hot recycle gas and enters the compression / thermal exchanger part of the recycle loop. The gas for recycling is cooled in the heat exchanger and, if the temperature of the gas is cooled below the condensation temperature, the liquid will condense from the gas. This liquid is desirably recycled continuously to the fluidized bed. It is possible to recycle the condensed liquid to the bed as liquid droplets carried in the gas stream for recycling. This type of process is described, for example, in EP-A-089691; USP 4,543,399; WO 94/25495 and USP 5,352,749. A particularly preferred method for recycling the liquid to the bed is to separate the liquid from the gas stream to recycle and re-inject this liquid directly into the bed, preferably using a method that generates fine droplets of the liquid within the bed. This type of process is described in WO 94/28032. The polymer is produced directly in the fluidized bed by the catalyzed copolymerization of the monomer and one or more comonomers in the fluidized particles of the catalyst, the supported catalyst or the prepolymer inside the bed. The initiation of the polymerization reaction is desirably achieved by using a bed of preformed polymer particles, which are preferably similar to the white polyolefin and bed conditioning according to techniques well known in the art. These processes are used commercially on a large scale for the manufacture of high density polyethylene (HDPE), medium density polyethylene (MDPE), linear low density polyethylene (LLDPE) and polypropylene. The gas used to fluidize the bed comprises the monomer or monomers that will be polymerized and also serves as a heat exchange medium to remove heat from the bed reaction. Hot gases emerge from the upper part of the reactor, usually by a calm zone, also known as a zone for speed reduction, which has a larger cross-sectional area than the fluidized bed and where the fine particles that entered The gas stream have a chance to gravitate back into the bed. It could also be advantageous to use a cyclone to remove fine particles from the hot gas stream. The gas is then normally recycled to the bed by means of a fan or compressor and one or more heat exchangers to purify the gas from the gas. polymerization heat. The polymer produced is flushed continuously or discontinuously from the fluidized bed as desired. Normally, the molar ratio of comonomer to monomer used in the polymerization depends on the density desired for the composition to be produced and desirably about 0.5 or less. Desirably, when producing materials with a range of ? k density from 0.91 to 0.93, the proportion of comonomer The monomer is less than 0.2, preferably less than 0.05, even more preferred less than 0.02, and may even be less than 0.01. Hydrogen can be added to the reaction in order to control the molecular weight and the melt index of the polymer.

Normally, the ratio of hydrogen to monomer is less than about 0.5, preferably less than 0.2, more preferably less than 0.05, even more preferred less than 0.01.

Many of the patents and patent applications describe gas phase processes that can be adapted to be used in the process of this • invention, in particular, the applications of the United States 4,588,790; 4,543,399; 5,352,749 , 36, 304, 5405, 922; 5,462,999; 5,461,123 5,453,471 5,032,562; 5,028,670; 5,473,028 5, 106, 804, 5,541,270, EP-A-659, 773; EP-A-692,500 WO 94/29032, WO 94/25497, WO 94/25495, WO 94/28032 10 WO 95/13305; WO 94/26793 and WO 95/07942. • EXAMPLES The skilled artisan will appreciate that the invention disclosed herein can be practiced in the absence of any component that has not been specifically exposed. The following examples are provided as a further illustration of the invention and are not intended to be limiting. Unless otherwise mentioned, all parties and • 20 percentages are expressed on a weight basis. The term "overnight", if used, refers to a time of approximately 16-18 hours. The term "ambient temperature" refers to a temperature of approximately 20-25 ° C and the term "Mixed alkanes" refers to a commercially obtained mixture of C6-8 aliphatic hydrocarbons available under the trade designation Isopar E® from Exxon Chemicals Inc.

The XH (300 MHz) and 13 C NMR (75 MHz) spectra were recorded on a Varian XL-300 spectrometer. The 1H and 13C NMR spectra refer to residual solvent peaks and are reported in ppm relative to tetramethylsilane. All J values are given in Hz. Tetrahydrofuran (THF), diethyl ether, toluene and hexanol were used after passing through double columns loaded with activated alumina and a purifying catalyst (Q-5® available from Englehardt Chemicals Inc.) The compounds BCl3-SMe2, BBr3-SMe2, B (NMe2) 3, n-BuLi were all used as purchased from Aldrich. The compound TiCl 3 (THF) 3 was prepared as described in the literature. All the syntheses were performed under atmospheres of dry nitrogen or argon using a combination of glove box and high vacuum techniques.

Example 1 Dichloro- [1,2-Bis (2,6-diisopropylanilide) 1,2-bis (dimethylamido) diborane] titanium 1A) Preparation of chlorobis (dimethylamido) borane, (modification of Chavant, PY, Vaultier, MJ Organome t.Chem. 1993, 455, 37-46) BCl3-SMe2 (62,000 g, 345.78 mmol) and B (NMe2) were stirred. 3 (98,921g, 691.56 mmoles) at room temperature overnight under a nitrogen scrubber. The mixture was then heated to reflux for one hour to extract any residual SMe2. Allow the pale yellow liquid to stir at room temperature until the desired clean product is isolated (44.979 g, yield percentage of 99.9). XH NMR (C6D6): d 2.49 (s, 12H). 13C NMR (C6D6): d 39.86.

IB) Preparation of Tetrakis (dimethylamido) diborane (modification of Noth, H; Meister, W. Z. Na t urfors ch., Tei l B 1962, 17,714) Chlorobis (dimethylamido) borane (30,000 g, 223. 19 mmol) was brought to reflux in hexane (200 ml) as a Na / K alloy [Na (1.539 g., 66.96 mmole) /8.726 g K (8.726 g, 223.19 mmole)] was added dropwise to the solution. After the first drops, the reaction started as was evident by a sudden increase in reflux. The heat source was turned off and the alloy added slowly to maintain a reflux. After the addition was complete, the reaction mixture was heated to reflux for an additional hour and then stirred at room temperature for three hours. The mixture was then filtered through a pad of diatomaceous earth and the volatiles were removed resulting in the isolation of a yellow liquid. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (7756 g, yield percentage of 35.1). ? NMR (C6D6): d 2.74 (s, 24H; 13 C NMR (C6D6; d 41.34 1C) Preparation of bis (dimethylamido) diborodichloride (modification of North, H; Meister, W. Z Na t urfors ch., Tei B B 1962, 17.714) The compound was stirred Tetrakis (dimethylamido) diborane (7.76 g, 39.29 mmol) in diethyl ether (100 ml) at -78 ° C was added dropwise as HCl (157 mmol, 157 ml of 1.0 M solution in diethyl ether). This mixture was then allowed to stir for six hours at room temperature. After the reaction period, the volatiles were removed and the residue was extracted and filtered using hexane. The removal of hexane resulted in the isolation of a yellow oil. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (4.72 g, yield percentage of 66.7).

XH NMR (C6D6): d 2.40 (s, 6H), 2.50 (s, 6H). 13C NMR (C6D6): d 37.62, 41.78.

ID) Preparation of lithium salt of 2,6-diisopropylaniline rl-BuLi (56.4 mmoles, 35.3 ml of 1.60 M solution in hexane) was added dropwise to a solution of 2,6-diisopropylaniline (10.0 g, 56.4 mmoles) in hexane (100 ml). This mixture was allowed to stir for 3 hours during which time a white precipitate formed. After the reaction period, the mixture was filtered and the white salt was washed with hexane and dried under vacuum and used without further purification or analysis (9.99 g, 96.7%). 1E) Preparation of 1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane Bis (dimethylamido) diborodichloride (2.35 g, 13.0 mmol) in diethyl ether (10 ml) was added dropwise a solution of lithium salt of 2,6-diisopropylaniline, (4.77 g, 26.0 mmol) in diethyl ether (50 ml) at 0 ° C. This mixture was then allowed to stir overnight at room temperature. After the reaction period, the volatiles were removed and the residue was extracted and filtered using hexane. Removal of hexane resulted in the isolation of a desired product as a white solid (5.32 g, yield percentage 88.9).

XH NMR (C6D6, RT): d 0.9-1.4 (br m, 24H), 2.3 (s, 6H), 2.8 (s, 6H), 3.7 (s, 2H), 7.0 (br s, 6H). 1F) Preparation of dilithium salt of 1,2- 5 Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane. 1,2-Bis (2,6-diisopropylanilide) -1,2-bis was stirred. (dimethylamido) diborane (1.82 g, 3.95 mmol) in hexane (75 ml) while 10 n-BuLi (7.91 mmol, 4.94 ml of 1.60 M solution in hexane) was added dropwise. This mixture was allowed to stir during • night. After the reaction period, the mixture was filtered and the salt was washed well with hexane and dried under vacuum resulting in the isolation of the desired product as a white powder (1.69 g, 90.4 yield percentage). 1G) Preparation of dichloro- [1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane] • 20 titanium Dallithium of 1,2-Bis (2,6) was added dropwise. -d? isoprop? lanilide) -1, 2- bis (dimethylamido) diborane, (0.60 g, 1.27 mmol) in THF (20 ml) to a suspension of TiCl3 (THF) 3 (0.47 g, 1.27 mmol) in THF (50 ml) at 0 ° C. This mixture was then allowed to stir at room temperature for 45 minutes. Then PbCl2 (0.177 g, 0.640 mmol) was added as a solid and the mixture was allowed to stir for an additional 30 minutes. After the reaction period, the volatiles were removed and the residue was extracted and filtered using hexane. Concentration of hexane and cooling to -10 ° C overnight resulted in the formation of orange crystals with X-ray quality (0.156 g, yield percentage of 21.3). E NMR (C6D6): d 1.23 (d, 3JHH = 6.6 Hz, 6H), 1.45 (d, 3JHH = 6.6 Hz, 6H), 2.17 (s, 6H), 2.7ß (s, 6H), 3.53 (septet, 3JHH = 6.6 Hz 4H), 7.11 (s, 6H) 10 • Example 2 Dichloro [1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane] titanium (alternating preparation) 2A) Preparation of chlorobis (dimethylamido) borane. BCl3-SMe2 (62,000 g, 345.78 mmol) and B (NMe2) 3 (98.921 g, 691.56 mmol) were stirred at room temperature overnight under a scrubber. • with nitrogen. The mixture was then heated to Reflux for one hour to extract residual SMe2. The pale yellow liquid was allowed to stir at room temperature resulting in the isolation of the desired product (139.436 g, yield percentage of 93.3). 25 XH NMR (C6D6): d 2.49 (s, 12H). 13C NMR (C6D6): d 39.86. 2B) Preparation of Tetrakis (dimethylamido) diborane via CIB (NMe) 2. Chlorobis (dimethylamido) borane was brought to reflux (30,000 g, 223.19 mmole) in hexane (200 ml) while a Na / K alloy was added dropwise to the solution [Na (1.539 g, 66.96 mmoles) /8.726 g K (8.726 g, 223.19 mmoles)]. After the first drops, the reaction started as was evident by an increase sudden in the reflux. The heat source went out Then the alloy was added slowly to maintain a reflux. After the addition was complete, the reaction mixture was heated to reflux for an additional hour and then stirred at room temperature for three hours. The mixture was then filtered through a pad of diatomaceous earth and the volatile components were removed resulting in the isolation of a yellow liquid i ^ k. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (7756 g, yield percentage of 35.1). XH NMR (C6D6): d 2.73 (s, 24H). 13C NMR (C6D6): d 41.37. 25 2C) Preparation of Tetrakis (dimethylamido) diborane via Bis (catecholate) diboro. Lithium dimethylamide (10.70 g, 210.0 mmol) was slowly added as a solid to a solution of bis (catecholate) diboron (10.00 g, 42.00 mmol) in diethyl ether (200 ml) at -20 ° C. This mixture was then allowed to stir for an additional 40 hours at room temperature. After the reaction period, the ether was removed under vacuum and the residue was extracted and filtered using hexane. The removal of hexane resulted in the isolation of a yellow oil. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (5,493 g, yield percentage of 66.0). 2D) Preparation of bis (dimethylamido) diborodichloride Tetrakis (dimethylamido) diborane (7.756 g, 39.19 mmol) in diethyl ether (100 ml) was stirred at -78 ° C and added dropwise as HCl (156.75 mmol, 156.75 ml solution 1.0 M in diethyl ether). This mixture was then allowed to stir for six hours at room temperature. After the reaction period, the volatile components were removed and the residue was extracted and filtered using hexane. The removal of hexane resulted in the isolation of a yellow oil. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (4722 g, yield percentage of 66.7).

XH NMR (C6D6): d 2.40 (s, 6H), 2.50 (s, 6H). 13C NMR (C6D6): d 37.62, 41.78. 2E) Preparation of lithium salt of 2,6-diisopropylaniline n-BuLi (56.40 mmol, 35.25 ml of 1.6 M solution in hexane) was added dropwise to a solution of 2,6-diisopropylaniline (10.00 g, 56.40 mmol) in hexane (100 ml). This mixture was allowed to stir for 10 3 hours during which time a white precipitate formed. After the reaction period, the mixture • filtered and the white salt was washed with hexane and dried under vacuum and used without further purification or analysis (9,988 g, percentage 96.7). 15 2F) Preparation of 1,2-Bis (2,6-diisopropylanilide) -1, 2-bis (dimethylamido) diborane Bis (dimethylamido) diborodichloride (2.350 g, 13.00 g) was added dropwise. mmol) in diethyl ether (10 ml) to a solution of lithium salt of 2,6-diisopropylaniline (4.765 g, 26.01 mmol) in diethyl ether (50 ml) at 0 ° C. This mixture was then allowed to stir overnight at room temperature. After the reaction period, the Volatiles were removed and the residue was extracted and filtered using hexane. The removal of hexane resulted in the isolation of a desired product as a white solid (5322 g, yield percentage 88.9).

XH NMR (toluene-d8): d 0.9-1.4 (br m, 24H), 2.3 (s, 6H), 2.8 (s, 6H), 3.7 (s, 2H), 7.0 (br s, 6H '13 C NMR (toluene-dg): d 22.51, 24.03 (br), 28.17 36. 82, 42.67, 123.19, 124.78, 140.71, 145.02 (br). MS (E1): m / z 460.4025 (M-H) +, calculated (M-H) + 460.4026. 2G) Preparation of dilithium salt of 1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane. 1,2-Bis (2,6-diisopropylanilide) -1, 2-bis ( dimethylamido) diborane (1820 g, 3,950 mmol) in hexane (75 ml) while n-BuLi (7.91 mmol, 4.94 ml of 1.6 M solution in hexane) was added dropwise. This mixture was then allowed to stir overnight. After the reaction period, the mixture was filtered and the salt was washed well with hexane and dried under vacuum resulting in the isolation of the desired product as a white powder (1.6878 g, yield percentage of 90.4). 1ti NMR (THF-d8): d 1.04 (d, 3JHH = 6.9 Hz, 6H), 1.18 (d, 3JHH = 6.9 Hz, 6H), 2.45 (s, 12H), 3.66 (septet, 3JHH = 6.9 Hz, 4H ), 6.29 (t, -3JHH = 7.5 Hz, 2H), 6.73 (d, 3JHH = 7.5 Hz, 4H). 13C NMR (THF-d8): d 24.88, 25.34, 28.00, 40.91, 114.40, 121.95, 137.21, 158.76. 2H) Preparation of dichloro- [1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) dibora] titanium Dilithium salt of 1,2-Bis (2,6-diisopropylanilide) was added dropwise ) -1, 2-bis (dimethylamido) diborane, (0.600 g, 1.27 mmol) in THF (20 ml) to a suspension of TiCl3 (THF) 3 (0.471 g, 1.27 mmol) in THF (50 ml) at 0 °. C. This mixture was then allowed to stir at room temperature for 45 minutes. The PbCl2 (0.177 g, 0.640 mmol) was then added as a solid and the mixture allowed to stir for an additional 30 minutes. After the reaction period, the volatile components were removed and the residue was extracted and filtered using hexane. Concentration of the hexane fractions and cooling to -10 ° C overnight resulted in the formation of orange crystals with X-ray quality (0.156 g, yield percentage of 21.3). XH NMR (toluene-ds): d 1.23 (d, 3JHH = 6.6 Hz, 6H), 1.45 (d, 3JHH = 6.6 Hz, 6H), 2.17 (s, 6 H), 2.76 (s, 6H), 3.53 ( septet, 3JHH = 6.6 Hz, 4H), 7.11 (s, 6H: 13 C NMR (toluene-d8) 24.94 24.67 29.48 39. 33, 42.93, 124.08 (br), 17.23, 150.64. MS (EI): /n/z578.2789 (M) +, calculated (M) + 578.2781. Analysis Calculated for C28H 6B2N2TiCl2: C, 58.07; H, 8.01; N, 9.67. Found: C, 8.28; H, 8.20; N, 9.42.

Example 3 Dimethyl [1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) dibora] titanium Dichloro- [1,2-Bis (2,6-diisopropylanilide) -1, 2- was stirred bis (dimethylamido) diboran] titanium (Example 2) (0.272 g, 0.470 mmol) in diethyl ether (40 ml) while MeMgBr (0.940 mmol, 0.313 ml of 3.0 M solution in diethyl ether) was added dropwise. This mixture was allowed to stir for one hour. After the reaction period, the volatiles were removed and the residue was extracted and filtered using hexane. The removal of the hexane resulted in the isolation of the desired product as a dark yellow oil (0.209 g, yield percentage of 82.5). XH NMR (C6D6): d 1.05 (s, 6H), 1.21 (d, 3JHH = 6.9 Hz, 16H), 1.32 (d, 3JHH = 6.3 Hz, 16H), 2.19 (s, 6H), 2.69 (s, 6H) ), 3.58 (br, 2H), 7.0-7.2 (m, 6H). 13C NMR (c6D6): d 24.06, 24.83, 29.31, 39.58, 42.93, 57.38, 123.97, 125.18, 139.5 (br), 149.45.

EXAMPLE 4 Dibenzyl [1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diboraz] zirconium Zirconium tetrachloride (0.100 g, 0.440 mmol) and tetrabenzyl zirconium (0.192 g, 0.440 mmol) were stirred together ) in diethyl ether (30 ml) for 1 hour. Then there was added dropwise dilithium salt of 1,2-Bis (2,6-diisopropylanilide) -1,2-bis (dimethylamido) diborane, (Example 2G) (0.400 g, 0.842 mmol) in diethyl ether (30 ml) and the mixture was allowed to stir for 3 hours. After the reaction period, the volatiles were removed under vacuum and the residue was extracted and filtered using hexane. The filtrate was then concentrated and cooled to -10 ° C overnight, at which time a white powder precipitated. The mixture was filtered again and the volatile components were removed resulting in the isolation of the desired product as a yellow oil (0.123 g, yield percentage of 19.8). 1H NMR (toluene-d8): d 1.14 (d, 3JHH = 6.6 Hz, 6H), 1.22 (br, 6H), 1.70 (d, 3JHH = 9-0 Hz, 2H), 1.83 (d, 3JHH = 9- 6 Hz, 2H), 2.10 (s, 6H) 2.71 (s, 6H), 3.0-3.2 (br, 2H), 3.3-3.5 (br, 2H), 6.59 (d, 3JHH = 7.2 Hz, 4H) 6.77 (t, 3 H = 7.2 Hz, 2H), 6.9-7.1 (m, 10H) 13, NMR (toluene-ds): d 23.96 (br), 24.22 (br), 24.36 (br), 25.23 (br), 29.47, 39.72, 43.05, 62.23, 122.70, 123.73 (br), 124.08 (br), 124.33, 127.23, 130.82, 139.26 (br), 140.16 (br), 144.90,144.92,149.03.

Example 5 rac-diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4 1,4-diphenyl-1,3-butadiene 5A) Preparation of diisopropylaminoboron dichloride. To a solution of methylene chloride of trichloroborane (1.0 M, 100 ml, 0.10 mole) was added dropwise at -78 ° C diisopropylamine (13108 ml, 0.100 mole) over a period of 30 minutes. The solution was allowed to stir for 1 hour, at which time a white precipitate formed. The mixture was allowed to warm to room temperature and the solvent was removed under reduced pressure. The residue is • dissolved in 100 ml of dry toluene, triethylamine (13.94 ml, 0.10 mole) was added and the solution was stirred overnight at room temperature. The mixture was filtered, the residue was washed with 20 ml of toluene. The solvent was removed under reduced pressure from the combined filtrates and the resulting oil was purified by vacuum distillation (25-28 ° C, 13 Pa, 0.1 mm) to provide 9.2 g (51 • percent) of the product as a colorless liquid. 20 XH NMR (C6D6): d 0.95 (d, 12H), 3.63 (multiplet broad 2 H). 5B) Preparation of N, N-diisopropylamino bis (2-methyl-4-phenylindenyl) borane 25 To 25 ml of THF solution of dichloride of N, N-diisopropylamino boron (0.858 g, 4.72 mmol) at room temperature was added dropwise (2-methyl-4-phenyl) indenido (2.00 g, 9.44 mmol in 20 ml of THF). The mixture was stirred for 24 hours. The solvent was removed under reduced pressure. The residue was extracted with toluene (2 x 50 ml), filtered through a medium frit and the solvent was removed under reduced pressure to give a bright yellow solid (2.4 g, 97 percent). 5C) Preparation of rac-diisopropylaminoboran-bis-? 5- (2-methyl-4-phenyl indenyl) zirconium? -l, 4-diphenyl-1,3-butadiene N, N-diisopropylamino bis (2-methyl-4-phenylindenyl) borane (1.20 g, 2.3 mmol) was dissolved in 40 ml of toluene, 2.1 equivalents of bis ( trimethylsilyl) amide potassium (0.964 g, 4.8 mmol) and the resulting mixture was stirred at room temperature for 24 hours. The volatile components were removed under reduced pressure and the resulting orange solid was washed with 10 ml of hexane, filtered and pumped dry. The potassium salt residue (1.3 g, 95 percent, 2.18 mmol) was dissolved in 25 ml of toluene. Dichloride from (1, -diphenyl-1,3-butadiene) bis (triethylphosphine) zirconium (1318 g, 2.18 mmol) and the solution was stirred for 12 hours at room temperature. The product mixture was filtered through a diatomaceous earth filter aid and the filtrate solvent was removed under reduced pressure. Further purification was carried out by crystallization of hexane to provide 0.85 g (48 percent) of the desired product as a dark red solid. XH NMR (C6D6): d 7.6 (d, 2H); 7.42-7.00, (m, 18H); 6.9 (d, 2H); 6.82 (d, 4H); 5.57 (s, 2H); 4.03, m, 2H); 3.45-3.57 (dd, 2H); 1.8 (s, 6H); 1.28-1.33 (m, 12H).

Example 6 Preparation of diisopropylamidoboranobis- (cyclopentadienyl) zirconium dichloride 6A) diisopropylamidoboron dichloride To a solution of BC13 (17 g, 145 mmol) in CH2C12 (25 ml) at -78 ° C was slowly added diisopropylamine (18.49 ml, 132 mmol) ). During the addition a white precipitate formed. The mixture was warmed to room temperature to provide a colorless solution. The solvent was removed under high vacuum at room temperature. The residue was then dissolved in benzene (45 ml). Triethylamine was added (18.8 ml, 134.6 mmol) to the solution at room temperature. The mixture was then stirred overnight at room temperature. Then it is filtered to provide a red solution. Vacuum distillation (27-28 ° C, 4 Pa) provided the product (15 g, 57 percent) as a colorless liquid: XH NMR (500 MHz, CDC13) d 1.26 (d, 12H, J = Hz) 3.95 (br, 2H, NCH) 13, NMR (100MHz, CDCl3) d22.1, 49.2 (br). X1BNMR (115MHz, CDC13) 29.4. MS (El, m / e (intensity)) 181 (M +, 5), 166 (43), 124 (61), 43 (100) • 5 6B) Diisopropylamidobis (cyclopentadienyl) borane To a solution of the previous product (0.39 g , 2.1 mmol) in THF (5 ml) at -78 ° C, a solution of lithium cyclopentadienide was added dropwise. (0.31 g, 2.1 mmol) in THF (10 mL) at -78 ° C. The mixture was slowly warmed to room temperature and stirred overnight at room temperature to provide a red solution. After removal of the solvent, the residue was extracted with Pentane (3 times) was filtered, and the pentane was then removed to give the product (0.55 g, 100 percent) as a yellow slurry. 13B NMR (1 15 MHz, C6D5) d 39.8 (major), 30.4 (minor). MS (El, m / e (intensity)): 241 (M +, 47), • 20 226 (40), 176 (16), 93 (100) GC-MS was also recorded in the reaction mixture briefly after mixing the two reagents at -78 ° C, from which it was only detected Cyclopentadienyldiiso-propylboroboro chloride: MS (El, m / e (intensity)): 211 (M +, 24), 196 (100), 154 (22). 6C) Dilithium of diisopropylamidobortyldicyclopentadienide To a solution of the previous product (0.61 G, 2.53 mmoles) in THF (7 ml) at -78 ° C, lithium diisopropylamide (5.57 mmoles, prepared in situ from diisopropylamine) (0.780 ml, 5.57 mmoles) and BuLi (2.50 M, 2.23 ml, 5.57 mmoles). The mixture was warmed to room temperature and stirred for 2 hours. The solvent was then removed, The residue was washed with pentane to give the product 0.58 g, 91 percent) as a white solid: XH NMR (360 MHz, THF-d8) d 1.24 (d, 12H, J = 6.8 Hz, NCHCH3), 4.54 (m , 2H, NCH), 5.74 (t, 4H, J = 2.4 Hz), 5.83 (t, 4H, J = 2.4 Hz) 13 C NMR (100 MHz, THF-d 8) d 23.9 (NCHCH 3), 25.9 (NCHCH 3), 49.3 (NCH), 104. 4, 111.9 1 L11B NMR (1 15 MHz, THF-d8) d 44.6 6D) Diisopropylamidoboranbis dichloride • 20 (cyclopentadienyl) zirconium To a solution of diisopropylamidobis (cyclopentadienyl) borane (0.71 g, 2.95 mmol) in Et20 (15 ml) at -78 ° C, lithium 'diisopropylamide (6.93 mmol) was added. The mixture was stirred for 2 hours at room temperature to provide a slightly cloudy solution. The solution was then added to a suspension of ZrCl4 (0.69 g, 2.95 mmol) in Et20 (15 mL) at -78 ° C. The resulting mixture was stirred overnight at room temperature to provide a yellowish suspension. The solvent was partially removed and the residue was concentrated and cooled to -78 ° C to provide the product (0.50 g, 38 percent) as colorless crystals. 1R NMR (400 MHz, CDC13) d 1.32 (d, 12H, J 7.0 Hz), 2.92 (m, 2H), 5.65 (t, 4H, J 2.4 Hz), 6.80 (t, 4H, J = 2.4 Hz). 13C NMR (100 MHz, CDC13) d 24.6.49.6, 111.4, 125.7. 13B NMR (1 15 MHz, CDC13) 5 37.6. HRMS (El), calculated for C? 6H22BNC? 2Zr: 399.0269, found: 399.0272.

Example 7 Preparation of meso-diisopropylamidoboranbis (inden-1-yl) zirconium dichloride 7A) Diisopropylamidobis (inden-1-yl) borane To a solution of diisopropylamidoboron dichloride (Example 3, step A)) (1-10 g, 6.0 mmoles) in THF (10 ml) at -78 ° C was added dropwise a solution of lithium aldeido (1.50 g, 12.3 mmol) in THF (40 ml) at -78 ° C. The mixture was slowly warmed to room temperature and stirred overnight at room temperature to provide a red solution. After removal of the solvent, the residue was extracted with CH2C12 (3 times), filtered and the solvent was removed to provide the desired product (2.12g, 100 percent) as a white solid. 11 B NMR (115 MHz, C6D,) d 41.4. MS (El, m / e (intensity)): 341 (M +, 8), 226 (100). HRMS (El), calculated for C24H28BN C24H28BN: 341.2315, found: 341.2310. 7B) Meso-diisopropylamido-boranbis (inden-1-yl) zirconium dichloride To a suspension of the previous product (0.39 g, 1.41 mmol) in Et20 (10 ml) at -78 ° C was added lithium diisopropylamide (prepared in situ). from iPr2NH (2.62 mmol) and BuLi (2.50 M), 2.62 mmole). The mixture was stirred overnight at room temperature to provide an orange suspension. The solvent was removed and the residue was extracted with toluene and filtered. The toluene was then removed to provide an orange solid composed of a mixture of two stereoisomers (rae / meso, ca. 6: 4). Repeated recrystallization (3 times) from toluene at -78 ° C afforded the pure meso isomer (0.08g, 14 percent) as an orange solid. P.f. = 250 -254 ° C (dec.). * HNMR (500 MHz, CDC13) 1.54 (d, 6H, J = 6.6 Hz), 1.57 (d, 6H, J = 6.8 Hz), 4.27 (m, 2H, NCH), 5.91 (d, 2H, J3.0 Hz), 6.9 (m, 4H), 7.1'7 (t, 2H, J = 7.6 Hz), 7.31 (dd, 2H, J = 8.3, 3.6 Hz), 7.53 (d, 2H, J = 8.6 Hz). 13C NMR (75 MHz, CDC13) d 24.7, 25.0 (NCHCH3), 49.7, 100.2 (BC), 115.7, 117.2, 125.2, 125.3, 125.6, 125. 9, 126.5, 131.4 11 B NMR (115MHz, CDC13) 839.5 HRMS (The calculated for C24H26BNC? 2Zr 499.0582 found, 499.0606. MS (El, m / e (intensity)): 501 (M +, 20), 458 (7), 341 (18), 226 (93), 143 ( 80), 115 (99) • Example 8 Preparation of bis (dimethylamide) of racisopropylamidoboranbis (inden-1-yl) zirconium To a mixture of diisopropylamidobis (inden-1-ylborane (Example 4, step A)) (1.01 g , 2.96 mmole) and Zr (NMe2) 4 (0.79 g, 0.96 mmole) was added toluene (15 ml). The resulting solution was heated to 65 ° C and stirred for 2 hours to provide a • bright red solution. The product consisted of two isomers with a ratio of 6.7: 1. The solution was filtered, concentrated and cooled to -78 ° C to give the pure isomer (0.50 g, 33 percent) as red crystals. The structure was confirmed by X-ray diffraction analysis on individual crystals developed from toluene / hexane at -20 ° C. • 20 P. f. = 220 ° C (dec.). XH NMR (500 MHz, C6D6) d 1.20 (d, 6H, J = 6.8 Hz), 1.27 (d, 6H, J = 6.6 Hz), 2.61 (s, 12H), 3.86 (in, 2H), 6.04 (d , 2H, j = 2.9 Hz), 6.74 '(m, 4H), 7.00 (t, 2H, J = 7.6 Hz), 7.37 (dd, 2H, J = 8.5, 0.9 Hz), 7.52 (d, 2H, J = 8.5 Hz). 13C NMR (90 MHz, C6D6) 5 24.6, 24.9, 47.9 (NCH3), 49.6, 105.6, 112.4, 123.1, 123.2, 124.0, 124.2, 126.3,129.1. 1XBNMR (115MHz, C6D6) d 40.8. HRMS (El), calculated for C28H38BN3Zr: 517.2206, found, 517.9917. MS (El, m / e (intensity)): 517 (M +, 20), 471 (45), 429 (100), 330 (24), 226 (70) EXAMPLE 9 rac- • diisopropylamidoboranbis (inden-1-yl) zirconium dichloride To a solution of bis (dimethylamide) rac- diisopropylamidoboranbis (inden-1-yl) zirconium (0.50 g, 0.96 mmole) in toluene (35 ml) a Room temperature was added trimethylsilyl chloride (2.0 ml, 15.76 mmoles). The solution was stirred for 8 hours at room temperature to provide an orange suspension. The solvent was removed, the residue was washed with pentane (2 times) to give the desired product (0.40 g, 83%). percent) as an orange powder. Individual crystals suitable for structural X-ray analysis were developed from mixed solvents of CH2C12 and hexane at -20 ° C. P.f. = 242 ° C (dec.). • 20 XH NMR (500 MHz, CDC13) d 1.50 (d, 6H, J = 6.8 Hz), 1.55 (d, 6H, J = 6.6 Hz), 4.24 (heptet, 2H, J = 1. 1 Hz) , 5.79 (d, 2H, J = 3.0 Hz), 6.80 (dd, 2H, J = 3.2, 0.7 Hz), 7.07 (t, 2H, J = 7.6 Hz), 7.28 (dd, 2H, J = 7.0, 0.7 Hz), 7.38 (t, 2H, J = 8.0 Hz), 7.58 9d, 2H, J = 8.8 Hz). 13C NMR (75 MHz, CDC13) d 24.7, 25.0, 49.6, 98.4 (BC), 113.1, 114.1, 122.0, 123.0, 125.8, 126.4, 127.2, 131.9. 1: LB NMR (115 MHz, CDC13) d 39.2. HRMS (El), calculated for C24H26BNCl2Zr: 499.0582, found, 499.0606. MS (El, m / e (intensity)): 501 (M +, 20), 458 (7), 341 (18), 226 (93), 143 (80), 115 (99). Analysis Calculated for C24H26BNCl2Zr: C, 57.48; H, 5.19; N, 2.79. Found: C, 57.46; H, 5.32; N, 2.68.

Example 10 Preparation of rac- (diisopropylamidoboran) bis (tetrahydroinden-1-yl) zirconium dichloride A solution of diisopropylamidoboranbis (inden-1-yl) zirconium dichloride (Example 6) (0.16 g, 0.32 mmol) in CH2C12 ( 7 ml) to an autoclave reactor containing Pt02 (0.0105 g). The mixture was flowed four times with H2 (200 psi, 1.4 MPa), then charged with H2 (1500 psi, 10.4 MPa) and stirred for 15 hours at room temperature to provide a greenish suspension. CH2C12 (25 mL) was added to the mixture which was then stirred. The solvent was removed under reduced pressure and the residue was washed with pentane (2 times) to give diisopropylamidoboranbis dichloride (tetrahydroinden-1-yl) zirconium (0.15 g, 92 percent) as a slightly greenish solid. XH NMR (400 MHz, C6D6) d 1.06 (d, 12H, J = 6.6 Hz), 1.33 (m, 2H), 1.47 (m, 2H), 1.92 (m, 4H), 2.05 (t, 1H, J = 4.8 Hz), 2.09 (d, 1H, J = 5.0 Hz), 2.34 (m, 2H), 2.53 (t, 1 H, J = 5.3 Hz), 2.56 (t, 1 H, J = 5.0 Hz), 3.20 (m, 2H), 3.60 (hept, 2H, J = 6.6 Hz), 5.01 (d, 2H, J = 2.9 Hz), 6.53 (d, 2H, J = 2.6 Hz). 13C NMR (100 MHz, C6D6) d 23.0, 23.6, 24.4, 24.7, 24.8, 27.0, 49.6, 109.7, 121.6, 124.2, 136.1. nB NMR (115 MHz, C6D6) d 39.2 ppm. HRMS (El) Calculated for C24H34 11BNCl2Zr 507.1208, found 507.1198.

Example 11 Preparation of rac-N, N-diisopropylamidoboran-bis-? 5- (2-methyl-4-naphthyl indenyl) zirconium? 4-l, 4-diphenyl-1,3-butadiene HA) Preparation of Potassium (2-methyl-4-naphthyl) indenide. 2-Methyl-4-naphthyldedene (1.00 g, 3. 27 mmoles) in 20 ml of toluene, potassium bis (trimethylsilyl) amide (1.05 equivalents, 3.43 mmol, 0.684 g) was added and the reaction mixture was stirred at room temperature for 24 hours, during which time a yellow solid precipitated . ' Hexane was added (20 ml) and the mixture was stirred for 2 hours. The solid product was isolated by vacuum filtration through a frit of medium porosity. The solid was pumped dry providing 1.10 g, 98 percent of the desired product. 11B) Preparation of N, N-diisopropylamino bis (2-methyl-4-naphthindenyl) borane To a solution of N, N-diisopropylaminoboro dichloride (0.309 g, 1.70 mmol) in 25 ml of THF at room temperature, drop was added. slowly drop a solution of potassium (2-methyl-4-naphthyl) indenide in 10 ml of THF (1.00 g, 3.40 mmol). The mixture was stirred for 24 hours at room temperature, the solvent was removed and the residue was extracted with toluene (2 x 25 ml). The combined extracts were filtered through a medium frit and the solvent was removed under reduced pressure to give a bright yellow solid (1.0 g, 95 percent). 11C) Preparation of rac-N, N-diisopropylaminoboran-bis-? 5- (2-met-il-4-naphthindenyl) zirconium? 4-l, 4-diphenyl-1,3-butadiene N, N-diisopropylamino bis was dissolved (2-methyl-4-naphthindenyl) borane (0.860 g, 1.38 mmol) in 20 ml of toluene, 2.05 equivalents of potassium bis (trimethylsilyl) amide (0.566 g, 2.84 mmol) were added and the reaction mixture was stirred at room temperature for 24 hours. The volatile components were removed under reduced pressure and the residue was redissolved in 25 ml of toluene. While stirring at room temperature, (1,4-di-phenyl-1-1, 3-butadiene) bis (triethylphosphine) zirconium dichloride (0.835 g, 1.38 mmol) was added and the solution was stirred for 12 hours at room temperature. room temperature. The product mixture was filtered through a diatomaceous earth filter aid and the filtrate solvent was removed under reduced pressure. The further purification was carried out by recrystallization from hexane to provide 0.27 g (21 percent) of the desired product as a solid dark red. XH NMR (C6D6): d 7.75-7.00, (mm, 30 H); 4.82 (s, 2H); 3.85-3.95 (m, 2H); 3.62-3.70 (dd, 2H); 1.82-1.9 (dd, 2H) 1.6 (s, 6H); 1.10-1.33 (, 12H).

Example 12 rac-1, 2-bis (dimethylamidodiboran) bis (2-methyl-4-phenylinden-1-yl) zirconium 4-l, 4-diphenyl-1,3-butadiene 12A) Preparation of 1,2-Bis (2-methyl-4-phenylinden-1-yl) -l, 2-bis (dimethylamido) -diborane Bis (dimethylamido) diborodichloride (0.500 g, 2.77 was added dropwise mmol) in diethylether (10 ml) was added to a lithium salt solution of 2-methyl-4-phenylindene (1,407 g, 11.07 mmol) in diethyl ether (50 ml) at 0 ° C. The mixture was stirred overnight at room temperature and the volatiles were removed. The residue was extracted using CH2C12. Filtration and removal of CH2C12 resulted in the isolation of a desired product as a pale yellow solid (0.902 g, yield percentage of 62.6). 12B) Preparation of dipotassium salt of 1,2-bis (dimethylamido) -1, 2-bis (2-methyl-4-phenylinden) diborane. 1,2-bis (dimethylamido) -1, 2-bis were stirred together (2-methyl-4-phenylenedine) diborane (0.791 g, 1.52 mmole) and KN (TMS) 2 (0.607 g, 3.04 mmole) in toluene (50 ml) overnight. The reaction mixture was then refluxed for one hour, cooled to room temperature and dried under vacuum. The residue is • 20 was suspended in hexane and filtered and the gold-colored microcrystalline solid was dried under vacuum. (0.881 g, yield percentage of 97.1). 12B) Preparation of rac- [l, 2-25 Bis (dimethylamido) -1, 2-bis (2-methyl-4-phenylinden) diboran] zirconium (trans, tran s-1,4-diphenyl-1, 3- butadiene) Dipotassium salt of 1,2-bis (dimethylamido) -1,2-bis (2-methyl-4-phenylinden) -diborane, (0.808 g, 1.35 mmol) was slowly added as a solid to a solution of , 4-diphenylbutadiene) ZrCl 2 (PEt 3) 2 (0.819 g, 1.35 mmol) in toluene (75 ml). This mixture was allowed to stir overnight. After the reaction period, the mixture was filtered and the volatiles were removed resulting in the isolation of a deep red residue. The residue was then suspended in cold hexane, filtered and dried under vacuum resulting in the isolation of the desired product as a dark red microcrystalline solid (0.501 g, yield percentage of 45.3). XH NMR (C6D6): d 1.1-1.2 (m, 2H), 2.02 (s, 6H), 2.66 (s, 6H), 2.90 (s, 6H), 3.3-3.4 (m, 2H), 5.28 (s, 2H), 6.82 (d, 3JHH = 6.6 Hz, 2H), 6.9-7.3 (m, 14H), 7.53 (d, 3 H = 8.4 Hz, 2H). 13C NMR (C6D6): d 15.10, 42.17, 44.36, 86.78, 93.34, 106.54, 119.17, 123.12, 123.39, 123.71, 124.26, 127.88, 128.51, 128.90, 129.34, 135.76, 140.85, 145.80.

Example 13 rac-diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) hafnium? -l, 4-diphenyl-l, 3- butadiene Hafnium tetrachloride (0.375 g, 1.17 mmol) was suspended in 40 ml of toluene. To this suspension was added triethylphosphine (0.346 ml, 2.34 mmol, via a syringe), Li powder (Aldrich, lower sodium, 0.081 g, 11.7 mmol), and 1,4-diphenyl-1,3-butadiene (0.242 g, 1.17 mmoles). The reaction mixture was stirred overnight at room temperature, then filtered using a medium porosity frit and diatomaceous earth cushion to remove unreacted Li metal. To the filtrate was added diisopropylamidobis (1- (2-methyl-4-phenylimidane)) borane dipotassium, K2 [1Pr2NB (2-Me-4-Ph-indenide) 2], (0.700 g, 1.17 mmol) using 10 ml of toluene to help the transfer. The reaction mixture was stirred for 1 hour at room temperature. The toluene was removed under reduced pressure and the reaction product was extracted with hexane (2 times) and filtered (medium porosity frit with diatomaceous earth cushion). The additional product was obtained by extracting the salt by-product using toluene and re-filtering using toluene and re-filtering using a frit of medium porosity and a diatomaceous earth cushion. The spectroscopic analysis of 1H NMR indicated that the isomer rac-1Pr2NB (2-Me-4-Ph-inden-l-yl) 2Hf (1,4-diphenyl-1,3-butadiene) was quite insoluble in hexane and that the undesirable meso-isomer could be separated by repeated extraction with hexane. Isolation and final purification of rac-1Pr2NB (2-Me-4-Ph-inden-1-yl) 2Hf (1, 4-dipheni-1, 3-butadiene) was carried out by extraction with soxhlet using hexane. After the hexane extract became colorless, the cartridge was removed and dried, yielding 0.042 g of rac-1Pr2NB (2-Me-4-Ph-inden-1-yl) 2Hf (1,4-difeni-1) , 3-butadiene) as determined by XH and 13C NMR spectroscopic analysis. XH NMR (C6D6): d 7.6 (d, 2H); 7.42-7.00, (m, 18H); 6.9 (d, 2H); 6.82 (d, 4H); 5.57 (s, 2H); 4.03, m, 2H); 3.45-3.57 (dd, 2H); 1.8 (s, 6H); 1.28-1.33 (m, 12H).

Example 14 rac-diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene In a glove box, diisopropylamidobis (2-methyl-4-phenylinden-1-yl) borane (0.125 g, 0.240 mmol) was dissolved in 20 ml of dry THF and 2 equivalents of potassium bis (trimethylsilyl) amide (0.500 molar solution, 0.960 ml, 0.480 mmol) over a period of 10 minutes at room temperature, after which the solution was stirred for 4 hours. The volatile components were removed under reduced pressure and the remaining solids were redissolved in 25 ml of toluene. While stirring was continued at room temperature, (1,4-diphenyl-1,3-butadiene) bis (triethylphosphino) zirconium dichloride (0.145 g, 0.240 mmol) was added and the resulting solution was stirred for 4 hours. The product was recovered by filtering the mixture through diatomaceous earth and removing the filtrate solvent under reduced pressure. The further purification was carried out by recrystallization from hexane to give the product as a dark red solid.

Example 15 Preparation of rae-. { 1Pr2NC (NxPr) 2 Jboran- bis-? 5- (2-methyl-4-phenylindenyl) zirconium? 4-l, 4-diphenyl-1,3-butadiene 15A) Preparation of dichloride of xPr2NC (N1Pr) 2} boron. Diisopropylcarbodiimide (1178 g, 9.33 mmol) was dissolved in 20 ml of toluene, cooled to 0 ° C. and the solid lithium diisopropylamide (1.00 g, 9.33 mmol) was slowly added to the solution over a period of 5 minutes. The solution was allowed to warm to room temperature while stirring was continued for 3 hours. The solution was added drop a drop later for a period of 30 • minutes to a solution of 1 molar heptane (0 ° C) of boron trichloride (9.33 ml, 9.33 mmol) and allowed to warm to room temperature overnight. The solution was filtered and the solvents were removed under reduced pressure to provide 2.3 g (97 percent) of bright yellow oil. XH NMR (C6D6): d 3.6-3.4 (m, 2H); 3.4-3.25 (septet, 2H); 1.43 (d, 12H); 0.8 (d, 12 H). • 20 15B) Preparation of bis (2-methyl-4-phenylindenyl). { 1Pr2NC (N1Pr) 2) borane Dichloride of. { 1Pr2NC (NxPr) 2} boron (0.30g, 0.97 mmol) in 30 ml of THT and potassium (2-methyl-4-phenyl) indenide (0.476g, 1.95) was added. mmol). The mixture was stirred for 24 hours at room temperature, followed by heating under reflux for 4 hours. The product mixture was allowed to cool to room temperature and the solvent was removed under reduced pressure. The residue was extracted with toluene (2 x 50 ml), filtered through a medium frit and the solvent was removed under reduced pressure to give a bright yellow solid (0.533 g, 85 percent). 15C) Preparation of rae-. { "" Pr? NC (NxPr) 2 Jborane -bis-? 5- (2-methyl-4-naphthyl indenyl) zirconium? -l, 4-diphenyl-1,3-butadiene Bis (2-methyl-4-phenylindenyl) was dissolved . { xPr2NC (NxPr) 2.}. borane (0.533 g, 0.82 mmoles) in 20 ml of toluene, 2.00 equivalents of potassium bis (trimethylsilyl) amide (0.0328 g, 1.65 mmol) were added and the reaction mixture was stirred at room temperature for 24 hours. The volatiles were removed under reduced pressure and the residue was washed with 2 x 25 mL of hexane. The volatile components were removed under reduced pressure to provide 0.382 g (64 percent) of the orange solid dipotassium salt. A portion of this solid (0.100 g, 0.14 mmol) was dissolved in 15 mL of toluene. While stirring continued at room temperature, (1,4-diphenyl-1,3-butadiene) bis (triethylphosphine) zirconium dichloride (0.084 g, 0.14 mmol) was added and the solution was stirred for 12 hours at room temperature. The product mixture was filtered through a diatomaceous earth filter aid and the filtrate solvent was removed under reduced pressure to provide 0.115 g (88 percent) of the crude product which subsisted as a ra / meso mixture. Further purification was carried out by recrystallization from hexanes to provide 0.015 g (12 percent) of the product as a dark red solid. XH NMR (C6D6): d 7.6-6.7, (mm, 26 H); 5.55 (s, 2H); 4.05-3.90 (m, 2H); 3.5 (dd, 2H); 2.7-2.4 (m, 2H); 1.78 (s, 6H); 1.55 (dd, 2H); 1.25 (m, 12 H); 0.95 (m, 12H).

Example 16 rac-dimethylamidoborate n-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium "!, 4-diphenyl-l, 3- 15-butadiene 16A) Preparation of dimethylamidodibromoborane B (NMe2) 3 was added to BBr3 'dropwise. The reaction immediately became exothermic. This mixture was allowed to stir for 2 hours at which time the NMR analysis showed that the reaction will be practically quantitative and complete (22,510 g, 25 percent yield of 99.9).

X HNMR (C 6D6): d 2. 3 1 (6H). 1 3C NMR (C 6 D6 4 1. Four. Five 16B) Preparation of dimethylamido-bis (2-methyl-4-phenylindinyl) borane. A solution of dimetiamidodibromoborano (0.511 g, 2.38 mmol) in toluene (10 ml) was cooled to 0 ° C and diethyl ether (2 equivalents) was added. This mixture was then added dropwise to a solution of lithium salt of 2-methyl-4-phenylindene, (1.01 1 g, 4. 76 mmol) in THF (50 ml) at 0 ° C. This mixture was then allowed to stir overnight at room temperature. After the reaction period, the volatile components were removed and the residue was extracted and filtered using hexane. The removal of hexane resulted in the isolation of a yellow oil (1.103 g, 99.9% yield). 16C) Preparation of dipotassium salt of dimeti lamido-bis (2-met il-4-phenyl indenyl) borane. Dimethylamido-bis (2-methyl-4-phenylmdenyl) borane (1010 g, 2.17 mmol) and KN (TMS) 2 (0.866 g, 4.34 mmol) in toluene (50 ml) were stirred together overnight. The reaction mixture was then refluxed for one hour, cooled to room temperature and dried under vacuum. The residue was suspended in hexane and filtered and an orange microcrystalline solid was dried under vacuum (1246 g,> 100 yield due to residual solvent still present as observed by NMR). 16D) Preparation of rae- [Dimethylamido-bis (2-methyl-4-phenylindene) boran] zirconium (trans, trans-l, 4-diphenyl-1,3-butadiene). Dipotassium salt of dimethylamido-bis (2-methy1-4-phenyl-lindenyl) borane, 10 (1246 g, 2.30 mmol) was slowly added as a solid to a solution of (1,4-diphenylbutadiene) ZrCl2 (PEt3) 2 ( 1,391, 2.30 Mmoles) in toluene (75 ml) and allowed to stir overnight. After the reaction period, the mixture was filtered and the volatiles were removed giving as result in the isolation of a dark residue. This residue was suspended in hexane and filtered. The red crystals developed over a period of 2 hours from the settlement of the hexane filtrate (0.222 g). The solid on the frit was washed • 20 through the frit using toluene and a second crop of crystals was developed from that mixture allowing the solution to concentrate slowly over a period of one week by slow evaporation of toluene (0.100 g). The The combination of the crystals obtained resulted in the isolation of a total of 0.322 g (yield percentage of 18.4) of a highly pure product. 1E NMR (C6D6): d 1.71 (s, 3H), 1.7-1.8 (m, 2H), 2.89 (s, 3H), 3.4-3.5 (, 2H), 5.52 (s, 2H), 6.76 (d, 3JHH = 7.2 Hz, 4H), 6.8-7.4 (m, 12H), 7.43 (d, 3JHH = 8.4 Hz, 2H). 13C NMR (C6D6): d 15.95, 39.52, 85.43, 90.93, 104.13, 117.32, 12.49, 121.65, 122.3 (br), 123.32, 124.19, 124.32, 127.81, 127.83, 128.68, 128.74, 128.81, 136.06, 140.55, 143.86. MS (E1): m / z 759.2635 (M-H) +, calculated (M-H) + 759,261 0.

Example 17 bis (trimethylsilyl) amido (γ-fluoren-9-yl) (β-cyclopentadienyl) boranocirconium dichloride 17A) Preparation of bistrimet-il-silylamido (9-fluorenyl) boron chloride. N-Butyllithium (2.5M hexane, 4.20 ml. , 10.50 mmol) to a solution of fluorene (1.66 g, 10.00 mmol) in THF (15 ml) at -78 ° C. The resulting mixture was slowly heated and stirred at room temperature for 5 hours to provide a red solution. The solution was cooled to -78 ° C and added dropwise to a solution of bis (trimethylsilyl) amidoboron dichloride.

(TMS) 2NBC12 (2.42 g, 10.00 mmol) in THF (25 mL) a -78 ° C to provide a bright yellow solution. The solution was stirred overnight at room temperature. The volatile components were removed and the residue was extracted with pentane and filtered. The pentane was removed to provide the desired product (3.70 g, 100 percent yield) as a white solid. 1ti NMR (400 MHz, CDC13): d 0.45 (s, 18H), 4.41 (s, 1H), 7.34 (dt, 2H, J = 7.4, 1.1 Hz), 7.42 (t, 2H, J = 7.3 Hz), 7.49 (d, 2H, J = 7.6 Hz), 7.87 (d, 2H, J = 7.4 Hz). 13C NMR (100 MHz, CDC13) d 4.6, 121.0, 125.4, 127.2, 127.3, 143.0, 145.9. X1B NMR (115.5 MHz, CDC13,) d 46.6. 17B) Preparation of bis (trimethylsilyl) amido (9-fluorenyl) (cyclopentadienyl) oran A solution of CpNa / THF (0.24 g, 2.40 mmol) in THF (15 ml) at -78 ° C was added dropwise to a solution of bistrimethylsilylamido chloride (9-fluorenyl) boron (0.89 g, 2.40 mmole) THF (15 ml) at -78 ° C. The resulting yellow solution was slowly warmed to room temperature with stirring and stirred overnight. The volatile components were removed under reduced pressure and the residue was extracted with pentane and filtered. The pentane solution was concentrated and cooled to -78 ° C to provide the desired product (0.57 g, 59 percent) as a white solid. XH NMR (400MHZ, C6D6): d 0.20 (s, 18H), 1.71 (t, 2H, J = 1.4 Hz), 4.33 (s, 1H), 5.93 (m, 1H), 6.13 (m, 1H), 6.69 (dd, 1H, J = 14.1.5 Hz), 7.09 (dt, 2H, J = 7.2, 1.5 Hz), 7.19 (dt, 2H, J = 7.4, 1.7 Hz), 7.46 (dd, 2H, J = 7.4 , 1.1 Hz), 7.70 (dd, 2H, J = 7.6, 0.8 Hz) 13 C NMR (100 MHz, C6D6,) d 5.1, 43.4, 120. 6, 125 126.7 127.2, 132.2, 139.5, 142.9, 143. 1, 147.4 11 B NMR (115.5MHz, C6D6) d 51.6. HRMS (El) • calculated for C 3H29BNSi, (M-CH3), 386.1932; found, 386.1945. 17C) bis (trimethylsilyl) amidoborane dichloro (yl-cyclopentadienyl) (? -fluoren-9-yl) zirconium 10 A solution of lithium diisopropylamide (prepared in situ from iPr2NH (0.54 ml, mmol) and BuLi (2.5 M hexane, 1.61 mil, 4.03 mmol) in THF (10 ml) was added to a solution of bis (trimethylsilyl) amido (9-fluorenyl) 15 (cyclopentadienyl) borane (0.77 g, 1.92 mmol) in THF (10 ml) at -78 ° C. The resulting mixture was slowly warmed to room temperature and stirred overnight to provide a dark red solution. The volatile components were removed to • 20 provide an orange solid which was then dissolved in toluene (15 ml). The toluene solution was added to a suspension of ZrCl 4 (0.40 g, 1.9 mmol) in toluene (8 ml) at -78 ° C. The mixture was warmed to room temperature and stirred during night to provide a dark red suspension. The volatile components were removed under reduced pressure and the residue was extracted with toluene and then filtered. The volatile components were removed under reduced pressure and the residue was washed with pentane (3 times) to give the product as a red solid. mp = 252-254 (dec.). ? H NMR (400 MHz, CDC13): d 0.26 (s, 9H), 0.50 (s, 9H), 5.44 (t, 2H, J = 2.4 Hz), 6.45 (t, 2H, J = 2.4 Hz), 7.19 (d, 2H, J = 8.4 Hz), 7.31 (t, 2H, J = 7.5 Hz), 7.62 (t, 2H, J = 7.8 Hz), 8.12 (d, 2H, J = 8.4 Hz). 13C NMR (75 MHz, CDC13) d 4.8, 5.9, 105.3, 121.4, 122.9, 124.4, 125.4, 125.7, 129.1, 143.0. UB NMR (115.5 MHz, CDC13) d 48.2. HRMS (El) calculated for C24H30BNSi2Cl2Zr: 559.0434; found, 559.0443.

Exam18 Diisopropylamidoboran (α-cyclopentadienyl) (β-fluoren-9-yl) zirconium 18A dichloride) Preparation of diisopropylamido (9-fluorenyl) boron chloride The reaction conditions of examExam17A) were practically repeated except that diisoproyl amide was used dichloroboro instead of bis (trimethylsilyl) amido-dichloroboron. At the end of the reaction, the solvent was removed, the residue was extracted with CH2C12 and filtered. The volatile components were removed to provide the product (0.91 g, 98 percent) as a yellowish solid. XH NMR (400 MHz, CDC13): d 1.36 (br, 6H), 1.79 (br, 6H), 4.41 (br, 1H), 7.35 (t, 2H, J = 7.7 Hz), 7.42 (t, 2H, J = 7.5 Hz), 7.50 (br, d, 2H, J = 4.7 Hz), 7.88 (d, 2H, J = 7.3 Hz). 13C NMR (100 MHz, CDC13) d 24.5 (br), 43.2 (br), 48.5 (br), 120.2, 124.4, 126.4, 126.9, 141.1 (br), 146.9. X1B NMR (115.5 MHz, CDC13) d 37.2. HRMS (El) Calculated for C19H23BNCI, 311.1612; found, 311.1613. 18B) Diisopropylamido (cyclopentadienyl) (9-fluorenyl) borane The reaction conditions of Exam17B were repeated with the exception that diisoproylamido (9-fluorenyl) boron was used in place of bis (trimethylsilyl) amido (9-fluorenyl) chloride. boro. The reaction of CpNa / THF (0.96 g, 9.60 mmol) and diisopropylamido (9-fluorenyl) boron chloride (2.98 g, 10.00 mmol) yielded a reaction mixture which was extracted with hexane and filtered. The volatiles were removed to provide the product (2.11 g, 62 percent) as a yellow solid. HRMS (El), Calculated for C24H28BN, 341.2315, found, 341.2329. 18C) Preparation of diisopropylamidoboran (β-cyclopentadienyl) (β-fluoren-9-yl) zirconium dichloride The reaction conditions of Exam17C) were repeated with the exception that diisopropylamido (9-fluorenyl) boron (1, 39 g, 4. 08 mmoles) in place of bis (tpmethylsilyl) amido (9-fluorenyl) boron. The crude reaction mixture from this reaction was extracted with toluene and filtered. The solution was concentrated, pentane was added and cooled to -78 ° C to provide the product (0.75 g, 36 percent yield) as a red solid. p.f. = 280-282 ° C. XH NMR (500 MHz. C6D6): 81.01 (d, 6H, J = 6.6 Hz), 1.22 (d, 6H, J = 6.9 Hz), 3.67 (pentane 1H, J = 6.6 Hz), 3.80 (pentane 1H, J = 6.6 Hz), 5.30 (t, 2H, J = 2.4 Hz), 6.38 (t, 2H, J =2. 4 Hz), 7.05 (d, 2H, J = 8.1 Hz), 7.12 (t, 2H, J = 7. 5 HZ), 7.46 (t 2H, J = 7.5 Hz), 7.92 (d, 2H, J = 8.5 Hz). 13C NNIR (90 MHz, CDC13) d 24.2, 25.4, 49.1, 49.8, 106.9, 122.2, 123.2, 125.4, 125.8, 129.0, 147.9, 157.1. 1XB NMR (1 15.5 MHz, C6D6) d 39.4. EA, calculated for C24H28BNZrCl2: C, 57.25, H, 5.57, N, 2.78. Found: C, 55.44; H, 5.30; N, 2.62.

Example 19 bis (trimethylsilyl) amidoborane bis (? - inden-1-yl) zirconium bis (dimethylamide) Bis (trimethylsilyl) amidoborobis (inden-1-yl) was prepared by reacting lithium indenide (0.50 g, 4.10 mmol) and bis (trimethylsilyl) amido boron dichloride (0.48 g, 2.00 mmol) in THF to give the product (0.75 g, 94 percent) as a yellowish solid. XH NMR (400 MHz, C6D6, major isomer): d 0. 32 (s, 18H), 3.64 (s, 2H), 6.08 (dd, 2H, J = 5.5, 1. 8. Hz), 6.48 (dd, 2H, J = 5.2 Hz), 6.82 (d., 2H, J = 7.3 Hz), 0.93 (dt, 2H, J = 7.1.1.2 Hz), 7.20 (m, 4H) nB NMR (115.5 MHz, C6D6) d 56 HRMS (The one calculated for C24H32BNS? 2, 401.2166, found, 401.2182. EA, Calculated for C24H32BNSi2, C, 71.82; H, 7.98; N, 3.49, Found: C, 70.06; H, 8.06; N, 3.36, Bis (trimethylsilyl) amidoborobis bis (inden-l-yl) (0.27 g, 0.67 mmole) and Zr (NMe2) 4 (0.18 g, 0.67 mmole) were then combined in toluene (10 ml) for 2 hours at 65 ° C to provide a red solution.The volatile components were removed under reduced pressure to provide the product as a red foam: 1ti NMR (400 MHz, C6D6): d 0.26 (s 18H), 2.53 (s, 12H), 5.95 (d, 2H, J = 2.9 Hz), 6.64 (d, 2H, J = 2.9 Hz ), 6.68 (t, 2H, J = 7.5 Hz), 6.95 (t, 2H, J = 7.6 Hz), 7.30 (d, 2H, J = 8.5 Hz), 7.45 (d, 2H, J = 8 Hz 13 C NMR (100 MHz, C6D6) d 5.6, 47.9, 105.1 111. 5, 122.2, 122.9, 124.2, 126.4, 128.5. 1X1i, B NMR (115.5 MHz, C6D6) d 50.3. HRMS (El) calculated for C28H42BN3Si2Zr, 577.2057; found, 577.2061.

Example 20 Bis (trimethyl) silylamidobis (β-inden-1-yl) boranezirconium dichloride Bis (trimethylsilyl) amidoborobis bis (inden-1-yl) (0.45 g, 1.12 mmol) and Zr (NMe 2) 4 were combined. (0.30 g, 1.12 mmol) in THF to provide an intermediate that was not further purified. The volatile components were removed under reduced pressure and replaced with CH2C12 (10 ml). The mixture was stirred with trimethylsilane chloride (1.42 mL, 11.20 mmol) overnight at room temperature. The volatiles were removed again under reduced pressure and the residue was extracted with CH2C12 and filtered. The solution was concentrated, stratified with pentane and cooled to -78 ° C to provide the desired product (0.54 g, 86 percent) as an orange solid. 1H NMR (500 MHZ, C6D6): d 0.20 (s, 18H), 5.54 (d, 2H, J = 3.3 Hz), 6.68 (dd, 2H, J = 2.1, 0.9 Hz), 6.85 (t.2H, J = 7.0 Hz), 7.04 (dd, 2H, J = 8.1, 1.1 Hz), 7.17 (m, 2H, overlapped with solvent residue peak), 7.33 (d, 2H, J = 8.4 Hz). 13C NMR (100 MHz, C6D6) 8 5.3, 112.8, 113.0, 123.6, 126.5, 127.1, 127.8, 132.1. nB NMR (115.5 MHz, C6D6) d 48.5. HRMS (El) calculated for C24H30BNSi2Ci2Zr, 559.0434; found, 559.0432.

Example 21 Preparation of rac- diisopropylamidoboran-bis-? - (2-isopropyl-4-phenyl indenyl) zirconium? 4-l, 4-diphenyl-l, 3-butadiene 21A) 2-Isopropyl-4-phenyl indene Sodium hydride (2.1 g, 60 percent dispersion in oil) was placed in a 500 ml flask under a nitrogen atmosphere. Hexane 5 (approximately 20 ml) was added to remove the oil, the mixture was stirred briefly. After stopping the agitation, the NaH was allowed to settle and the liquids were eliminated by means of a syringe. This procedure was repeated one more time, then it was added THF (200 ml) to NaH and the suspension was cooled with a ^ Ice bath. Diethyl isopropylmalonate (10.10 g, 50.00 mmol) in THF (100 ml) was added via an addition funnel for 30 minutes. After finishing the malonate addition, the solution is stirred for an additional 40 minutes. A solution of (30 ml) of 2-phenylbenzyl bromide in THF (12.5 g, 50.5 mmol) was added via an addition funnel and the mixture was stirred overnight. The next morning, 100 ml of chloride was added • 20 N ammonium. The solution was diluted with ether (200 ml) and the organic layer was washed with brine, dried over Na 2 SO 4 and removed from the solvent under reduced pressure. The red orange oil was used without further purification. The crude alkylation product was dissolved in ethanol (300 ml) and water (75 ml). Potassium hydroxide (20 g) was added and the mixture was refluxed overnight. After cooling, the ethanol was removed under reduced pressure. Hexane was added and stirred for 1 hour to dissolve any undesirable organic materials. The hexane was decanted and water (approximately 150 mL) was added. The solution was made acidic (at pH 1) by the addition of concentrated HCl. The desired carboxylic product was extracted with ether, dried over Na2SO4, and purified under reduced pressure. The NMR spectrum of the crude product (10.74 g, 80 percent) indicated that hydrolysis and flB decarboxylation of the ester were completed. The crude product that solidified to a tan solid was used without further purification. Thionyl chloride (50 ml) acid was added Carboxylic acid and the mixture was stirred overnight at room temperature to dissolve the acid. Excess thionyl chloride was removed under reduced pressure and the remaining acid chloride was dissolved in ^) Methylene chloride (75 ml). This solution was added drops by dropwise addition funnel to a suspension of aluminum chloride (5.70 g, 42.5 mmol) in methylene chloride (25 ml) and cooled with an ice bath. The reaction was allowed to slowly warm to room temperature and was stirred the night. The solution was emptied on ice (approximately 100 ml) and stirred vigorously for 1 hour. The organic layer was separated, the aqueous layer was washed once with ether and the combined organic layers were washed with brine, dried over Na 2 SO 4 and stripped under reduced pressure. The crude 2-isopropyl-4-phenylindanone (10.0 g) as an orange-brown oil was used without further purification. 2-Isopropyl-4-phenylindanone (12.1 g, 48 mmol) was stirred in a mixture of THF and methanol (100 ml, 2/1) while sodium borohydride (1.5 g, 40 mmol) was added in small portions over 30 minutes. minutes. After stirring overnight, • added ice (approximately 50 ml) and the mixture was stirred for 0.5 hours. The THF and MeOH were removed under reduced pressure. Ether (approximately 250 ml) was added, the pH was adjusted to pH 1 by the addition of aqueous HCl and the ether layer was separated. The ether was washed with saturated solution with sodium bicarbonate, then brine, dried over Na 2 SO 4, and evaporated under reduced pressure. The mixture of alcoholic isomers (11.0 g, 43.5 mmol, 90 • 20 percent) was obtained as a waxy cinnamon-colored solid. It was used without purification. The crude mixture of isomeric alcohols was dissolved in toluene (150 ml) to which p-toluenesulfonic acid (0.5 g) was added. The solution is refluxed in a flask equipped with a Dean-Stark trap for 1.5 hours and then cooled. Solid sodium bicarbonate was added and the mixture was stored overnight in a refrigerator. The next morning, water (100 ml) was added and the organic layer was separated, dried over Na 2 SO and purified under reduced pressure. The product, 2-isopropyl-4-phenylindene (10.4 g) was obtained as a brown oil. 5 Analysis by GC indicated a purity of > 96 percent in area. This material was stored cold under an inert atmosphere until it was ready for further conversion. XH-NMR (CDC13): d 1.18 (d, 6H), 2.74 (septet 10 1 H), 3.39 (s, 2H), 6.53 (s, 1 H), 7.09-7.55 (m, 8H). • 21B) Lithium 2-isopropyl-4-phenylinidene To a toluene solution (25 ml) of 2-isopropyl-4-phenylindene (3.34 g, 14.25 mmole), in a glove box loaded with argon, n-butyl lithium (5,500 ml, 13.75 mmol) was added. The mixture was stirred at room temperature overnight. The toluene was removed under reduced pressure. Hexane (20 ml) was added and removed under reduced pressure • 20 then added again (50 ml). The mixture was stirred for 1 hour, then filtered, washed with approximately 15 ml hexane and the filtrate was dried under vacuum. The lithium indenidated product (3.09 g) was obtained as an orange-brown powder. East material was stored in the glove box until it was needed. XH-NMR (d8-THF): d 1.27 (d, 6H), 3.02 (septet, 1H), 5.84 (s, 1H), 6.06 (s, 1H), 6.42-6.51 (m, 2H), 7.15 (t , 1H), 7.18 (d, 1H), 7.26 (t, 2H), 7.82 (d, 2H). 13C-NMR (d8THF): ppm 147.00, 141.54, 130.59, 130.40, 129.20, 128.16, 126.70, 125.02, 118.68, 113.92, 113.40, 91.01, 89.77, 30.62, 25.78. 21C) N, N-diisopropylamido bis (2-isopropyl-4-phenylindenyl) borane To 25 ml of toluene solution of N, N-diisopropylamidoboron dichloride (0.501 g, 2.75 mmol) at room temperature was added dropwise (2 g). -isopropyl-4-phenyl) indenide potassium (1.50 g, 5.51 mmol in 20 ml of toluene). The mixture was heated to reflux and stirred for 6 hours. The solution was cooled to room temperature, filtered through a medium frit and the solvent was removed under reduced pressure to give a bright yellow solid (1.57 g, 99 percent). This material was further purified by column chromatography (silica gel / hexane) to provide 0.6 g (38 percent) of a bright yellow solid (96 percent pure by GC). 21D) rac-diisopropylamidoboran-bis-? 5- (2-isopropyl-4-phenyl-indenyl) zirconium? 4-l, 4-diphenyl-1,3-butadiene In a glovebox, N, N- was dissolved diisopropylamino bis (2-isopropyl-4-phenylindenyl) borane (0.380 g, 0.660 mmol) in 20 ml of toluene, 2.1 equivalents of potassium bis (trimethylsilyl) amide (0.276, 1.38 mmol) were added and the resulting mixture was stirred at room temperature for 24 hours. The volatiles removed under reduced pressure were removed. The resulting orange solid was combined with 10 ml of hexane, filtered and pumped dry. The dipotassium salt residue (0.415 g, 97 percent 0.635 mmol) was redissolved in 20 ml of toluene and (1,4-diphenyl-1,3-butadiene) bis (triethylphosphino) zirconium dichloride (0.384 g) was added. , 0.635 mmole). The solution was stirred for 2 hours at room temperature, followed by heating at 80 ° C for 6 hours. The product mixture was cooled to room temperature, filtered through diatomaceous earth and the filtrate solvent was removed under reduced pressure. Further purification was carried out by recrystallization from hexane to provide 0.21 g (36 percent) of the product as a dark red solid. 2 H NMR (C 6 D 6): d 7.62 (d, 2 H); 7.42-6.7, (mm, 24H); 5.79 (s, 2H); 4.5, septet, 2H); 3.45-3.57 (dd, 2H); 2.8-2.9 (septet, 2H) 1.65-1.72 (dd, 2H); 1.35 (d, 12H); 1.2-1.3 (m, 12H).

Example 22 rac-diisopropylamidoboran-bis-? - (2-methyl-4-phenylinden-1-yl) zirconium 4-l, 4-diphenyl-1,3-butadiene supported A solution of toluene of methyldi (octyl) ammonium hydroxyphenyl tris- (pentafluorophenyl) borate ( 825 μl, 0.040M, 33.0 μmol, the ammonium cation is derived from a mixture of commercially available amines such as methylbis-seboamine) and a toluene solution of triethyl aluminum (TEA) (363 5 μL, 0.10 M, 36.3 μmol) They combined and mixed for 30 seconds. The resulting solution was then added to 1.0 g of TEA-treated silica (Grace-Davison 948 silica, calcined at 250 ° C for 4 hours, treated with 1.5 mmole of TEA / g, washed with toluene and hexanes mixed and dried under pressure • reduced. The mixture was shaken vigorously with the hand to break the clods and then mechanically stirred for 5 minutes. The volatile components were then removed under pressure reduced. A toluene solution of ra-diisopropylamidoboran-bis- [5- (2-met il-4-phenylinden-1-yl) zirconium] -4-, 4-diphenyl-1,3-butadiene (1500 [mu] l, 0.020 M, 30.0 μmol) the mixture was vigorously stirred by hand to break the clods and then stirred • 20 mechanically for 5 minutes. The volatile components were removed once again under reduced pressure to provide the supported catalyst as a blue / gray solid.

Example 23 rac-dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? -1,4-diphenyl-1, 3-butadiene A toluene solution of methyldi (octyl) ammonium hydroxyphenyltris (pentafluorophenyl) borate (578 μl, 0.040 M, 23.1 μmol) and a triethylaluminum toluene solution (254 μl, 0.100 M, 25.4 μmol) were added and mixed for 30 seconds. This solution was then added to 0.70 g of silica treated with TEA (silica Grace-Davison 948, calcined at 250 ° C for 4 hours, treated with 1.5 mmole of TEA / g, washed with toluene and hexanes and dried under reduced pressure). Mix stirred vigorously with the hand to break the • clods and then stirred mechanically for 5 minutes. The volatile components were then removed under reduced pressure. A toluene solution of rac-dimet ilamidoboran-bis-? 5- 15 (2-methyl-4-phenyl-inden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene (1050 μl, 0.020 M, 21.0 μmol). The mixture was shaken vigorously with the hand to break the clods and then stirred mechanically for 5 minutes. • minutes The volatile components were removed then under reduced pressure to provide a blue solid.

Example 24 supported rac-diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium ^ 1,4-diphenyl-25-butadiene supported A solution of toluene of bis (tris ( penta-fluorophenyl) aluminano) imidazolide methylbis (octadecyl) ammonium (689 μl, 0.0479 M, 33.0 μmol) prepared in accordance with USSN 09 / 251,664, filed on February 17, 1999) was added to 1.0 g of silica treated with TEA (Silica Grace-Davison 948, calcined at 250 ° C for 4 hours, treated with 1.5 mmole of TEA / g, washed with toluene and hexanes and dried under reduced pressure). The mixture was shaken vigorously with the hand to break the clods and then mechanically stirred for 5 minutes. The volatile components were then removed under reduced pressure. A toluene solution of rac-diisopropylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4_l, 4-diphenyl-l, 3-butadiene (1500 μl, 0.020 M, 30.0) was added. μmol). The mixture was shaken vigorously with the hand to break the clods and Then it was stirred mechanically for 5 minutes. The volatile components were then removed under reduced pressure to provide a blue solid.

Example 25 rac-dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1, 3-butadiene supported Under an argon atmosphere, a toluene solution of bis (tris (pentafluorophenyl) aluminum) imidazolide methylbis (octadecyl) ammonium 25 (689 μl, 0.0479 M, 33.0 μmol) to 1.0 g of silica treated with TEA (silica Grace-Davison 948, calcined at 250 ° C for 4 hours, treated with 1.5 mmol TEA / g, washed with toluene and hexanes and dried under reduced pressure.The mixture was stirred by hand to break the clods and then mechanically stirred for 5 minutes.The volatile components were removed then under reduced pressure.

-Toluene solution of rac-dimethylamidoboran-bis-? 5- (2-methyl-4-phenylinden-1-yl) zirconium? 4-l, 4-diphenyl-1,3-butadiene (1500 μl, 0.020 M, 30.0 μmol). The mixture was stirred by hand to break the clods and then mechanically stirred for 5 minutes.

The volatile components were then removed under • reduced pressure to provide a bright blue solid.

Gas Phase Polymerization 15 A fixed-bed, agitated 2.5-L autoclave was charged with 200 g of NaCl containing 0.1 g of KH as a scrubber. Stirring started at 300 rpm. The reactor is pressurized to 0.8 MPa of ethylene and heated to 72 ° C. 1-hexene is introduced to the reactor • 20 followed by the addition of hydrogen. In a separate vessel, 0.05 g of catalyst is mixed with 0.1 g of additional KH scavenger. The combined catalyst and the scrubber are subsequently injected into the reactor. The pressure of ethylene25 is maintained as required while hexene and hydrogen are fed to the reactor to maintain their respective concentrations. The temperature of the reactor is regulated by a circulating water bath. After 90 minutes, the reactor is depressurized, and the salt and polymer are removed. The polymer is washed with large amounts of distilled water to remove the salt, dried at 60 ° C and then stabilized by the addition of a hindered phenol antioxidant (Irganox ™ 1010 from Ciba Geigy Corporation) and 133 mg of a stabilizer of phosphorus. The activity values were calculated based on ethylene extraction. The results 10 are shown in Table 1. ^? Table 1 Run Hexeno H2 Catter1 Density2 MMl3 MW x MWD I10 / I2 da (ppm) (ppm) (dg /) 10"3 1 Axis 22 5000 0 1 12222..77 0 0., .889999 <0.01 315 2.84 2 Axis 23 5000 0 1 11155..00 0 0 .. .990000 <0.01 301 2.92 3"4000 500 8 844..11 0 0 .. .990055 < 0.01 272 3.07 4"5000 0 1 13344..11 0 0 .. .889999 <0.01 323 2.26 5" 5000 3000 112200..00 00 .. .889988 < 0.01 222 3.24 6"5000 6000 111166..77 00 .. .990000 <0.01 192 2.50 7 Axis 24 5000 6000 114400..77 00 .. .889999 0.026 180 3.16 34.2 8 Axis 25 5000 6000 5544..00 00 .. .889988 < 0.01 194 2.56 9"Axis 23 5000 8000 113333..88 00 .. .990011 0.04 187 2.84 23.0 Polymer g / cat. G + cocat. / Hr. / (MPa x 0.1) 2 The density is determined by the technique displacement using methylethyl ketone 3 melt index, I2, ASTM D-1238, 190 ° C / 2.16 Kg, lyo ASTM D-1238, 190 ° C / 10 Kg The reaction is run for 5 hours

Claims

NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property: 1. An olefin polymerization process comprising contacting one or more monomers of olefin under gas phase polymerization conditions with a catalyst composition comprising a metal complex corresponding to the following formulas:
Y1 / Y * TZ \ tz »? i i MQ
Formula 1 or Formula 2 wherein: M is titanium, zirconium or hafnium, in the oxidation state +4, +3, or +2; Y1 and Y2 are independently a p-linked, anionic, cyclic or non-cyclic group, NR1, PR1; NRX2 or
PRX2; Z is boron or aluminum; Q is a neutral, anionic or dianionic ligand group that depends on the oxidation state of M; j is 1, 2 or 3, depending on the oxidation state of M and the electronic nature of Q; Independent T in each event is:
R is independently in each event hydrogen, a hydrocarbyl group, a tri (hydrocarbyl) silyl group or a tri (hydrocarbyl) silylhydrocarbyl group, the R1 groups contain up to 20 atoms not counting hydrogen; R5 is R1 or N (RX) 2; and two R1 groups together or one or more R1 groups together with R5 may be optionally linked to form a ring structure. 2. The process according to claim 1, wherein the metal complex corresponding to formula 1 is represented by formula 4, 5, 6, 7, 8 or 9:
Formula 4 Formula 5 Formula 6 Formula 7 Formula 8 Formula 9 wherein M, Z, T, Q and j are as defined in claim 1; R2 is hydrogen, or a hydrocarbyl, halohydrocarbyl, dihydrocarbylamino-hydrocarbyl tri (hydrocarbylsilyl) hydrocarbyl, Si (R3) 3, N (R3) 2, or an OR3 group of up to 20 carbon atoms or silicon and optionally two adjacent R2 groups they can be joined together, thereby forming a fused ring structure, especially a
F indenyl ligand or a substituted indenyl ligand; and R3 is independently hydrogen, a hydrocarbyl group, a trihydrocarbylsilyl group or a trihydrocarbylsilylhidorcarbyl group, the R3 group has up to 20 atoms not counting hydrogen. 3. A process according to claim 2, wherein M is in the oxidation state +4, j = 2 and Q independently in each event is halide, hydride, • 20 hydrocarbyl, silylhydrocarbyl, hydrocarbyl oxide or dihidocarbilamide, group Q has up to 20 atoms without counting hydrogen, or two Q groups together form an alkanediyl group or a conjugated diene ligand C4_40 that together with M form a 25 metallocyclopentene. 4. A process according to claim 2, wherein M is in the oxidation state +3, j = 1 and Q is either 1) a monovalent anion stabilizing ligand selected from the group consisting of alkyl, cycloalkyl, aryl, silyl, amido, phosphido, alkoxy, aryloxy, sulfide and mixtures thereof, the Q group is further substituted with a substituent containing amine, phosphine, ether, or thioether capable of forming a covalently coordinated bond or a chelating bond with M, the ligand has up to 50 atoms not counting hydrogen; 2) a C3-? Hydrocarbyl group or comprising an ethylenic unsaturation capable of forming a? 3-linkage with M. 5. A process according to claim 2, wherein M is in the oxidation state +2, j = 1 and is a neutral conjugated diene, optionally substituted with 1 or more tri (hydrocarbyl) silyl or tri (hydrocarbylsilyl) hydrocarbyl, the Q group has up to 40 carbon atoms and forms a p-complex with M. 6. A process according to claim 3, in wherein the metal complex corresponds to the formulas 4a, 5a, 6a, 7a, 8a or 9a, wherein the definitions of M, Z, R1, R2 and R3 are as defined in claim 3:
Formula 4a Formula 5a Formula 6a Formula 7a Formula 8a Formula 9a and Q, independently in each event is a halide, hydrocarbyl, hydrocarbyloxy or dihydrocarbylamide group of up to 10 atoms not counting hydrogen, or two Q groups together form a C4-20 diene ligand which together with M forms a metallocyclopentene. 7. A process according to claim 4, wherein the metal complex corresponds to the formulas 4b, 5b, 6b, 7b, 8b or 9b, wherein the definitions of M, Z, R1, R2 and R3 are as defined in Claim 4:
Formula 4b Formula 5b Formula 6b Formula 7b Formula 8b Formula 9b and Q, in each occurrence is anionic, monovalent stabilizing ligand, selected from the groups consisting of alkyl cycloalkyl aryl and silyl the group is further substituted with one or more amine substituents, phosphine or ether capable of forming a covalent coordinate bond or a chelating link with M, and group Q has up to 30 atoms without hydrogen; or Q is a C3-? 0 hydrocarbyl group comprising an ethylenic unsaturation capable of forming a? 3 bond with M. 8. A process according to claim 5, wherein the metal complex corresponds to the formulas 4c, 5c, 6c, 7c , 8c or 9c, wherein the definitions of M, Z, R1, R2 and R3 are as defined in claim 5:
Formula 4c Formula 5c Formula 6c Formula 7c Formula 8c, 0 Formula 9c and Q, in each event is a neutral conjugated diene, optionally substituted with one or more tri (hydrocarbyl) silyl groups or tri (hydrocarbyl) silylhydrocarbyl groups, the Q group has up to 30 atoms not counting hydrogen and forms a p complex with M 9. A process according to any of claims 1 to 8, wherein M is zirconium or hafnium. 10. A process according to claim 9, wherein Z is boron.
11. A process according to claim 1, wherein the metal complex is dimethylamidoboran-bis (? 5-cyclopentadienyl) zirconium dichloride, dimethylamidoboranbis (? 5-inden-1-yl) zirconium dichloride, dimethylamidoboran-bis dichloride (? 5-2-methyl-4-phenyl-inden-1-yl) zirconium, dimethylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium dichloride, dimethylamidoboran-bis dichloride (? 5-2- isopropyl-4-phenylinden-1-yl) zirconium, dimethylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium dichloride, dimethylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium, diisopropylamidoboran-bis (? 5-cyclopentadienyl) zirconium dichloride, diisopropylamidoboran-bis (? 5-inden-1-yl) zirconium dichloride, diisopropylamidoboran-bis dichloride ( ? 5-2-methyl-4-phenyl-inden-1-yl) zirconium, diisopropylamidoboran-bis (? 5-2-ethyl-4-phenylinden-l-yl) zirconium dichloride, diisopropylamidoboranbis dichloride (? 5-2-isopropyl) -4-phenylinden-1-yl) zirconium, dicl diisopropylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenylinden-l-yl) zirconium oxide, diisopropylamidoboran-bis (? 5-3-t-butylinden-l-yl) dichloride zirconium, diphenylamidoboran-bis (? 5-cyclopentadienyl) zirconium dichloride, diphenylamidoboran-bis- (? 5-inden-1-yl) zirconium dichloride, diphenylamidoboranbis- (? 5-2-methyl-4-phenylinden-1-dichloride) -il) zirconium, diphenylamidoboran-bis (? 5-ethyl-4-phenylinden-1-yl) zirconium dichloride, diphenylamidoboran-bis (? 5-isopropyl-4-phenylinden-1-yl) zirconium dichloride, diphenylamidoboran dichloride -bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium, diphenylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium dichloride, dimethylamidoboran bis (? 5-cyclopentadienyl) zirconium 1,4-diphenyl-l, 3-butadiene, dimethylamidoboran-bis (? -inden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoboran-bis (? -2-methyl-4-phenylinden-l-yl) zirconium 1,4-diphenyl-l, 3-butadiene , dimethylamidoboran-bis (? 5-2-ethyl-4-phenyl-inden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoboran-bis (? 5-2-isopropyl-4-phenylinden-1- il) zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 1,4-diphenyl- 1,3-butadiene, dimethylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-cyclopentadienyl) zirconium 1, 4- diphenyl-l, 3-butadiene, diisopropylamidoboranbis (? 5-inden-l-yl) zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-2-methyl-4-phenylinden-1-yl) ) zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diisopropylamidoboran-bis ( 5-2-isopropyl-4-phenylinden-1-yl) zirconium 1, 4-diphenyl-1,3-butadiene, diisopropylamidoboran-bis (? 5-2-methyl-4-bis (3,5-trifluoromethyl) phenyl-inden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene , diisopropylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (? 5-cyclopentadienyl) zirconium 1,4-diphenyl-3-, butadiene, diphenylamidoboranbis (? 5-inden-l-yl) zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboran-bis (? 5-2-methyl-4-phenylinden-l-yl) zirconium 1, 4- diphenyl-l, 3-butadiene, diphenylamidoboran-bis (? 5-2-ethyl-4-phenylinden-1-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diphenylamidoboran-bis (? 5-2-isopropyl) -4-phenylinden-l-yl) zirconium 1,4-diphenyl-l, 3-butadiene, diphenylamidoboran-bis (? 5-met il-4-bis (3,5-tri fluoromethyl) phenyl-inden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene, or diphenylamidoboran-bis (? 5-3-t-butylinden-1-yl) zirconium 1,4-diphenyl-1,3-butadiene.
12. A process according to claim 1, wherein the catalyst additionally comprises a support material. The process according to claim 1, which is a continuous gas phase polymerization. The process according to claim 13, wherein the ethylene is homopolymerized or a mixture of C2-6 olefins is copolymerized. 15. The process according to any of the preceding claims, wherein the resulting polymer contains long chain branching.