Process for the preparation of .alpha.-chloromethyl- silanes

Details Process for the preparation of .alpha.-chloromethyl- silanes Process for the preparation of .alpha.-chloromethyl- silanes

C - Chemistry, Metallurgy

07

F

204/91.15

C07F 7/12 (2006.01)

Patent

CA 1083995

ABSTRACT OF THE DISCLOSURE An improvement in a process for the preparation of an .alpha.-chloromethylsilane of the general formula ClCH2(CH3)3-nSiCln wherein n is 0 to 3, by chlorination of a methylchlorosilane of the general formula (CH3)4-nSiCln wherein n has the aforesaid meaning, with elemental chlorine while exposing the reaction mixture to light. The improve- ment resides in maintaining the reaction mixture at a temperature in the vicinity of the boiling point of the methylsilane to be chlorinated by regulating the metering in of methylsilane to be chlorinated and continuously passing chlorine gas through the reaction zone at a constant rate and withdrawing reaction product at such a rate that the concentration of chloromethylsilane amounts up to 18 weight percent. By such a process, yields in excess of 90% of monochloromethylsilane are obtained.

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