Prepn. of di-, tri- or tetra-silyl-methane - by reacting aryl-halo-silane with di-, tri- or tetra -halo-methane in presence of reducing metal, and reacting prod. with hydrogen halide

摘要

Prepn. of a silylmethane of formula CH 4-m(SiH3)m (I), where m is 2-4, comprises reacting an arylhalogenoosilane of formula ArSiH2X1 with a halogenomethane of formula CH/4-m)Xm. Ar is an (un)substd. aryl and X is a halogen. The reaction takes place in the presence of a reducing metal. The resulting arylsilyl -methane of formula CH4-m (SiH2Ar)m is reacted with a hydride. USE/ADVANTAGE: In the prepn. of monocrystalline silicon. The prepn. of (I) is safe , simple and gives consistently high yields.