Abstract Hydrosilylation of cyclohexene and allyl chloride in the presence of Pt (0) complexes with tetramethyldivinyldisiloxane (Karstedt catalyst) and hexavinyldisiloxane was studied. It was shown that these catalysts are much more active in the hydrosilylation of cyclohexene with trichloro-, dichloro (methyl)-, and chlorodimethylsilane than the Pt (II)- containing Speier catalyst. In the hydrosilylation of allyl chloride in the presence of Pt (0) ...