Study on Platinum Complexes of Allylsil(ox)anes as Hydrosilylation Catalyst

The title complexes were prepared by the reaction of chloroplatinic acid (Ⅰ) with allylsilanes of formula (CH\-2 CHCH 2)\-nSiR (4-n) (n=2,3,4 and R=Me, Ph) and 1,3 diallyl tetramethyl disiloxane(DATM) made from chlorosil(ox)anes and allyl chloride(Ⅱ) by Grignard reaction.It was found that the platinum complexes of TAS(n=4),DMDA(n=2,R=Me),MTA(n=3,R=Me) and DATM showed higher catalytic activity than Ⅰ in the reaction of trichlorosilane with Ⅱ.The activity of title complexes in the reaction of vinyl terminated polydimethyl siloxane with poly(methyl hydrogen siloxane co dimethylsiloxane) was also discussed,and it was found that the catalytic activities of various catalysts were different.