Satd. polyfunctional organo-silicon cpds. prodn. - by hydrosilylation of methacrylonitrile or vinyl-silane cpd. using homogeneous nickel complex catalyst

摘要

Prodn. of satd. polyfunctional organo-Si cpds. (I) involves the reaction of 1-substd. alkenes (II) of the formula CH2=CR-Y (in which R is Me and Y is CN) with equimolar amts. of hydrochlorosilanes (III) of the formulae HSiCl3, HSiCl2R' or HSiClR'2 (in which R' is Me or Et) in the presence of catalysts. The novel feature is that R can also be H, in which case Y is -SiCl(x)Me(3-x) (in which x is 0-3) and the reaction of (II) with (III) is carried out as homogeneously catalysed hydrosilylation with Ni-(O) and Ni-(II) complex catalysts (IV). (IV) is bis-(tri-n-butyl phosphine)-dichloro-Ni-(II), tri-n-butyl- phosphonium-tri-n-butyl phosphine-trichloro-nickelate-(II), bis-(dimethylphenyl phosphine)-dichloro-Ni-(II) (IVA), bis-(tri-1,2 -butylphosphine-1,2 -dicyano ethylenedithiolato-Ni- (II), 2-(N,N-dimethylamino) phenyl-diphenyl phosphine-dichloro-Ni- (II) or tetrakis-(diphenyl phosphine)- Ni-(O) (IVB). If R is Me and Y is CN, (IVA) is used, whilst if R is H and Y is SiClxMe(3-x), (IVB) is used. The (IV) concn. is 10 exp. -2 to 10 exp. -3 mole/ mole (II) or (III) and the reaction is carried out at 100-150 deg.C. The desired (I) can be obtd. in economical yields and the process can be carried out at low temp.