Synthesis of Poly-ω-(Methylseleno)Undecylsiloxane Platinum Complex and Its Catalytic Hydrosilylation Behavior

AbstrcatA silica-supported poly-ω-(methylseleno)undecylsiloxane platinum complex was synthesized from ω-chloroundecyltriethoxysilane via immobilization on fumed silica, followed by reacting with sodium methylselenolate in ethanol and potassium chloroplatinite in acetone under Ar atmosphere. The catalytic properties of the platinum complex for hydrosilylation of olefins with triethoxysilane were investigated. The results showed that the title complex exhibited high catalytic activity for the hydrosilylation of olefins used with triethoxysilane when the reaction temperature was at 80 ℃ and the amount of the catalyst was 0.6 mol‰ of the alkene. This polymeric platinum complex can be reused several times without serious loss of activity.