Table of Contents
Molecules, Volume 21, Issue 3 (March 2016)
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Cover Story cis- and trans-Isomers of [PtCl2(NCR)2] (R = NMe2, N(C5H10), Ph, CH2Ph) were examined as catalysts [...] Read more. cis- and trans-Isomers of [PtCl2(NCR)2] (R = NMe2, N(C5H10), Ph, CH2Ph) were examined as catalysts for hydrosilylation cross-linking of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated poly(dimethylsiloxane-co-ethylhydrosiloxane) producing high quality silicone rubbers. Among the tested platinum species, the cis-complexes are much more active catalysts than their trans-congeners and, for all studied platinum complexes, cis-[PtCl2(NCCH2Ph)2] exhibits the best catalytic activity. Although cis-[PtCl2(NCCH2Ph)2] is less active than the widely used Karstedt’s catalyst, its application for the cross-linking can be performed not only at room temperature, but also, more efficiently, at 80 °C and it prevents adherence of the formed silicone rubbers to equipment. The usage of the cis- and trans-[PtCl2(NCR)2] complexes as the hydrosilylation catalysts do not require any inhibitors and, moreover, the complexes and their mixtures with vinyl- and trimethylsilyl-terminated polysilo