Synthesis of novel poly(ethylene glycol)‐containing imidazolium‐functionalized phosphine ligands and their application in the hydrosilylation of olefins

Abstract

A series of polyethylene glycol-containing imidazolium-functionalized phosphine ligands (mPEG-im-PPh 2 ) were successfully synthesized and used in the rhodium-catalyzed hydrosilylation of olefins. The results indicate that the RhCl 3 /mPEG-im-PPh 2 catalytic system exhibits both excellent activity and selectivity for the β-adduct. In addition, the catalytic system may be recycled at least six times.

Synthesis of alkynyl phosphite ligands and its application in the preparation of high stability one‐component heat‐curable silicone rubber

“…13 The process of hydrosilylation reaction is shown in Figure 1. A series of transition metals (such as platinum, [14][15][16] rhodium, [17][18][19] palladium, 20,21 and ruthenium 22,23 ) have been proven to be effective catalysts for the preparation of hydrosilylation reaction. Although in the past two decades a wide range of catalysts for hydrosilylation reaction has been reported, the most popular used catalysts are still platinum-based catalysts in industry, which have been developed for more than half a century, such as Pt (0)-divinyl-tetramethyl disiloxane complex (Karstedt's catalyst) 24,25 and the isopropyl alcohol solution of H 2 PtCl 6 (Speier's catalyst).…”