Synthesis and catalytic behavior of polysiloxane-supported fullerene platinum or rhodium complexes

Two polysiloxanes with pendant fullerene moieties and their platinum or rhodium complexes have been prepared from C-60 via amination with omega-decenylamine, followed by hydrosilylation with triethoxysilane and immobilization on fumed silica or by hydrosilylation with methyldichlorosilane and polycondensation with polydimethylsiloxanol, and then by reacting them with potassium chloroplatinite or rhodium chloride in acetone respectively under argon atmosphere. It was found that the four noble metal complexes are effective catalysts for the hydrosilylation of olefins with triethoxysilane. The regioselectivity of platinum complexes for styrene increases remarkably by introducing C-60 moiety. Factors influencing catalytic activity and the mechanism have been investigated.