DE1122953B - Process for the preparation of alkylrhenium pentacharbonylene - Google Patents
Process for the preparation of alkylrhenium pentacharbonyleneInfo
- Publication number
- DE1122953B DE1122953B DEB52167A DEB0052167A DE1122953B DE 1122953 B DE1122953 B DE 1122953B DE B52167 A DEB52167 A DE B52167A DE B0052167 A DEB0052167 A DE B0052167A DE 1122953 B DE1122953 B DE 1122953B
- Authority
- DE
- Germany
- Prior art keywords
- alkylrhenium
- preparation
- pentacharbonylene
- rhenium
- compounds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F11/00—Compounds containing elements of Groups 6 or 16 of the Periodic System
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/20—Carbonyls
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/30—Organic compounds compounds not mentioned before (complexes)
- C10L1/305—Organic compounds compounds not mentioned before (complexes) organo-metallic compounds (containing a metal to carbon bond)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/70—Complexes comprising metals of Group VII (VIIB) as the central metal
- B01J2531/74—Rhenium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
- B01J31/122—Metal aryl or alkyl compounds
Description
Verfahren zur Herstellung von Alkylrheniumpentacarbonylen Alkylmetallcarbonyle sind bei einigen Übergangselementen, wie z. B. Kobalt und Mangan, bereits bekannt. Entsprechende Rheniumverbindungen sind dagegen bisher nicht bekannt. Process for the preparation of alkylrhenium pentacarbonyls, alkylmetal carbonyls are with some transition elements such. B. cobalt and manganese, already known. Corresponding rhenium compounds, however, are not yet known.
Es wurde nun gefunden, daß man Alkylrheniumpentacarbonyle durch Alkylierung von Rheniumpentacarbonylverbindungen der allgemeinen Formel XRe(CO)5 wobei X entweder ein Wasserstoffatom oder ein Alkalimetall oder ein Erdalkalimetall (z. B. 1/2 Ca) bedeutet, herstellen kann, wenn man die genannten Verbindungen in Gegenwart indifferenter Lösungsmittel mit an sich bekannten Alkylierungsmitteln umsetzt. It has now been found that alkylrhenium pentacarbonyls can be obtained by alkylation of rhenium pentacarbonyl compounds of the general formula XRe (CO) 5 where X is either a hydrogen atom or an alkali metal or an alkaline earth metal (e.g. 1/2 Ca) means, can be produced if the compounds mentioned are indifferent in the presence Reacts solvent with known alkylating agents.
Die Umsetzung verläuft z. B. nach der Gleichung NaRe(CO)s + CH3J -- CH3Re(CO)5 + NaJ oder Die Umsetzung verläuft bereits bei Zimmertemperatur und normalem Druck, jedoch kann man auch bei höheren Temperaturen und Drücken arbeiten.The implementation proceeds z. B. according to the equation NaRe (CO) s + CH3J - CH3Re (CO) 5 + NaJ or The reaction already takes place at room temperature and normal pressure, but you can also work at higher temperatures and pressures.
Die Alkalipentacarbonylrhenate kann man z. B. durch Umsetzen von Rheniumpentacarbonyl Re(CO)5k mit Alkaliamalgam herstellen. Der Rheniumpentacarbonylwasserstoff läßt sich z. B. durch An säuern von Alkalipentacarbonylrhenaten gewinnen. The Alkalipentacarbonylrhenate can z. B. by implementing Prepare rhenium pentacarbonyl Re (CO) 5k with alkali amalgam. The rhenium pentacarbonyl hydrogen can z. B. win by acidifying alkali pentacarbonylrhenates.
Die Alkylierung erfolgt unter Anwendung an sich bekannter Alkylierungsmittel, wie Methyljodid, Dimethylsulfat, Äthyljodid, Diäthylsulfat, Benzylchlorid und Diazomethan. Es hat sich in vielen Fällen als zweckmäßig erwiesen, das Alkylierungsmittel im Überschuß anzuwenden. The alkylation is carried out using known alkylating agents, such as methyl iodide, dimethyl sulfate, ethyl iodide, diethyl sulfate, benzyl chloride and diazomethane. In many cases it has proven to be useful to use the alkylating agent in the To apply excess.
Als indifferente Lösungsmittel eignen sich z. B. Suitable inert solvents are, for. B.
Tetrahydrofuran, Diäthyläther, Dioxan oder Dimethylglykoläther.Tetrahydrofuran, diethyl ether, dioxane or dimethyl glycol ether.
Die erhaltenen Alkylrheniumpentacarbonyle sind leichtflüchtige, im Hochvakuum sublimierbare Verbindungen, die sich durch weitgehende Beständigkeit an der Luft auszeichnen. Sie können als Katalysatoren, insbesondere für Umsetzungen in der organischen Chemie, wie z. B. für Carbonylierungsreaktionen, oder als Antiklopfmittel in Treibstoffen Verwendung finden. The resulting alkylrhenium pentacarbonyls are volatile, im High vacuum sublimable compounds, which are characterized by extensive resistance mark in the air. They can be used as catalysts, especially for reactions in organic chemistry, e.g. B. for carbonylation reactions, or as an anti-knock agent find use in fuels.
Beispiel 1 5 g Rheniumpentacarbonyl werden bei Zimmertemperatur in 200 g Tetrahydrofuran als Lösungs-:nittel mit überschissigem IO/oigem Natriumamalgam zur Reaktion gebracht. Das nicht umgesetzte Amalgam wird abgetrennt und die Lösung des Natriumsalzes mit der annähernd theoretischen Menge an CH3J versetzt. Das entstandene leichtflüchtige CH3Re(CO)5 wird im Vakuum zusammen mit dem Lösungsmittel abdestilliert und aus dem Lösungsmittel durch Zugabe von Wasser ausgefällt. Zur weiteren Reinigung kann die Verbindung im Hochvakuum sublimiert werden, wobei farblose, stark lichtbrechende Kristalle resultieren, die bei 120"C schmelzen und sich oberhalb etwa 140"C langsam unter Dunkelfärbung zersetzen. Die Ausbeute beträgt 700/0 der Theorie. Example 1 5 g of rhenium pentacarbonyl are at room temperature in 200 g of tetrahydrofuran as a solvent with excess sodium amalgam to the Brought reaction. The unreacted amalgam is separated and the solution of the The approximately theoretical amount of CH3I is added to the sodium salt. The resulting highly volatile CH3Re (CO) 5 is distilled off together with the solvent in vacuo and precipitated from the solvent by adding water. For further cleaning the compound can be sublimed in a high vacuum, whereby colorless, highly refractive Crystals result that melt at 120 "C and slowly melt above about 140" C decompose, turning dark. The yield is 700/0 of theory.
Bei Verwendung eines Uberschusses an CH3J läßt sich die Ausbeute an CH3Re(CO)S steigern, und zwar bis zu 90°/0, wobei allerdings das Endprodukt weniger rein erhalten wird. If an excess of CH3I is used, the yield can be reduced increase in CH3Re (CO) S, up to 90 ° / 0, although the end product is less is preserved pure.
Beispiel 2 856 mg (1,31 m Mol) Rheniumpentacarbonyl werden in 50 ccm Tetrahydrofuran gelöst, und die nach der Reduktion mit Natriumamalgam erhaltene Carbonylmetallatlösung wird mit 0,310 ccm (332 mg, 2,62 m Mol) reinem Benzylchlorid versetzt. Nach etwa 1 stündigem Stehenlassen ist die Reaktion unter Abscheidung von Natriumchlorid beendet. Aus dem zur Trockne eingedampften Reaktionsgemisch sublimiert Benzylrheniumpentacarbonyl bei 600 C im Vakuum, wobei man eine gelbe Flüssigkeit erhält, die nach öfterem Umsublimieren in hellgelben Kristallen von charakteristischem, scharfem Geruch kristallisiert. Ausbeute 505 mg, entsprechend 45% der Theorie; Schmp. 33 bis 34° C. Example 2 856 mg (1.31 m mol) of rhenium pentacarbonyl are in 50 ccm of tetrahydrofuran dissolved, and that obtained after reduction with sodium amalgam Carbonyl metallate solution is made with 0.310 cc (332 mg, 2.62 m mol) of pure benzyl chloride offset. After about 1 hour of standing, the reaction is under separation terminated by sodium chloride. Sublimes from the reaction mixture which has evaporated to dryness Benzylrhenium pentacarbonyl at 600 C in vacuo, leaving a yellow liquid obtained, which after repeated sublimation in light yellow crystals of characteristic, pungent odor crystallizes. Yield 505 mg, corresponding to 45% of theory; M.p. 33 to 34 ° C.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB52167A DE1122953B (en) | 1959-02-19 | 1959-02-19 | Process for the preparation of alkylrhenium pentacharbonylene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB52167A DE1122953B (en) | 1959-02-19 | 1959-02-19 | Process for the preparation of alkylrhenium pentacharbonylene |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1122953B true DE1122953B (en) | 1962-02-01 |
Family
ID=6969798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB52167A Pending DE1122953B (en) | 1959-02-19 | 1959-02-19 | Process for the preparation of alkylrhenium pentacharbonylene |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1122953B (en) |
-
1959
- 1959-02-19 DE DEB52167A patent/DE1122953B/en active Pending
Non-Patent Citations (1)
Title |
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None * |
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