The reactions of separate and competitive hydrosilylation of propylene with
HSiCl3, MeSiHCl2, Me2SiHCl, and MePh2SiH in the presence of the Speier cat
alyst (SC) with different additives and a catalyst obtained from SC and pro
pylene were studied. A mutual influence of the hydrosilanes in the competit
ive reactions was found. The influence various additives to SC on the proce
ss was considered.