Patent ID: 6169196
Filing Date: 2001-01-02
Classification: C07F

Abstract:
A process for the preparation of di- and trialkylsilanes of the general formula (I) R.sub.a R.sup.1.sub.b SiX.sub.c (I) by hydrosilylation, comprising reacting mono- or dialkylsilanes of the general formula (II) R.sup.1.sub.b SiH.sub.a X.sub.c (II) with alkenes A having at least 3 carbon atoms, which are optionally substituted by fluorine, chlorine, or bromine, or cyano groups, in the presence of a transition metal catalyst and a trihalogenosilane of the general formula (III) R.sup.2 SiY.sub.3 (III) as an activator, wherein, in the above general formulae (I) to (II), R is a branched or cyclic hydrocarbon radical having at least 3 carbon atoms, optionally substituted by fluorine, chlorine, or bromine, or cyano groups, R.sup.1 is an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, R.sup.2 is a hydrogen atom, or an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, X is fluorine, chlorine, or bromine, or an alkoxy radical having 1 to 18 carbon atoms optionally substituted by fluorine, chlorine, or bromine, or cyano groups, Y is fluorine, chlorine or bromine, a is 1 or 2, b is 1 or 2, and c is 1 or 2.