Abstract: 4-Thia-6-dimethylaminohexyltrimethoxysilane was synthesized by condensation of γ-mereaptopropyltrimethoxysilane and β-chloroethyldimethylamine hydrochloride in the presence of sodium methoxide. The new silicon monomer was subjected to hydrolysis and immobilization on fumed silica, followed by reaction with potassium chloroplatinite to give the title platinum complex. The complex was found to be an effective catalyst for the hydrosilylation of olefins with triethoxysilane.The influences of temperature, the amount of the complex used,and the kind of olefins on the catalytic activity were investigated.

Key words: supported-catalyst, hydrosilylation, sulfide, amine-containing silicon monomer, platinum, complex