- Synthesis of unsymmetrical 1,2-bis(diorganochlorosilyl)ethanes
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Unsymmetrical 1,2-bis(diorganylsilyl)ethanes were synthesized by two procedures. Hydrosilylation of chloro(vinyl)silanes were used to obtain compounds of the general formula ClMe2SiCH2CH 2SiRMeCl with different substituents (R = Et, Vin, Ph) on the silicon atom. Chlorodealkylation of 1,2-bis(trialkylsilyl)ethanes gave compounds of the general formula ClAlk2SiCH2CH2SiAlk 2Cl (Alk = Me, Et, Pr). It is established that the latter reaction provides high yields only with Me-and Et-substituted compounds, whereas Pr-substituted products are formed in poor yields. The mechamism of this reaction based on quantum-chemical calculations is offered.
- Lakhtin,Knyazev,Gusel'nikov,Buravtseva,Kuyantseva,Zalomnova,Parshkova,Bykovchenko,Kisin,Chernyshev
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experimental part
p. 1668 - 1674
(2009/02/06)
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- Process for the preparation of halogenated 1,2-disilaethanes
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A process for the preparation of halogenated 1,2-disilaethanes of the general formula X3?nRnSi—CHR1CHR1—SiRnX3?n??(I) in which R may be identical or different and denotes a hydrogen atom or a monovalent optionally substituted hydrocarbon radical having 1 to 40 carbon atom(s) per radical, R1may be identical or different and denotes a hydrogen atom or a monovalent optionally substituted hydrocarbon radical having 1 to 40 carbon atom(s) per radical, X denotes a halogen atom and n denotes 0, 1 or 2, wherein halogenated 1,2-disilaethenes of the general formula X3?nRnSi—CR1═CR1—SiRnX3?n??(II) in which R, R1, X and n have the meaning stated above therefor, are reacted with hydrogen in the presence of promoting catalysts. The product is produced in high yield and purity.
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- Organosilicon compound and process for producing organosilicon compound
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An organosilicon compound having a Si--C--C--Si bond, a C=C--Si bond and/or a CH--CH--Si bond is prepared by reacting an olefin or a substituted olefin with a disilane in the presence of a platinum-containing catalyst. The resulting compound can be further treated with an alkyl lithium, an aryl lithium or a Grignard reagent.
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