Dendronized polystyrene supports for new catalytic systems

New catalytic systems based on tris(dimethylvinyl) methyl substituted polystyrene were prepared. Dendronized polystyrenes were obtained by modi. cation of poly(styrene-co-chloromethylstyrene) precursors with LiC(SiMe2CH = CH2)(3). Platinum was attached to the polymers via coordination to vinyl groups located on carbosilane moieties. Such the catalytic system makes an interesting alternative for heterogenous platinum catalysts (Pt/charcoal, Pt/Cact and Pt/Al2O3) and also to Karstedt's catalyst, when used in hydrosilylation of vinylsilanes. (C) 2008 Elsevier B.V. All rights reserved.