Supported transition metal complex catalysts hydrosilylation

It is very clear that the field of supported transition metal complex catalysts is a rapidly expanding field. Indeed, only their application to hydrogenation, hydrosilylation, and hydroformylation reactions have received more than a preliminary skirmish. Already a number of points are becoming clear. 

Although the reaction can occur by mediation of free radicals generated in the reaction mixture, most catalysts used, predominantly transition metal complexes (but also nucleophilic-electrophilic catalysts as well as metal and supported metals), accomplish the process through a heterolytic mechanism. Scientific literature provides a number of surveys of hydrosilylation reactions or particular aspects of these processes, including general reviews, chapters or books, and articles. The surveys that appeared before 1990 (44 references in total) have been listed in our book entitled Comprehensive Handbook on Hydrosilylation, published in 1992 (3). 

A review on the industrial applications of homogeneous catalysts is particularly welcome. The proceedings of recent symposia and a general text have been published in addition to reviews on metal cluster catalysts, activation of saturated hydrocarbons by metal complexes in solution, catalysis by arene Group-VIB tricarbonyls, titanocene-catalysed reactions ofalkenes, transition-metal hydrides in catalysis, the mechanisms of the catalytic cyclization of aliphatic, hydrocarbons, asymmetric hydrosilylation and asymmetric synthesis. A n.m.r. study of the conformations of chelated Diop and a MO study of organo-metallic migration reactions are also of interest. Polymer supported catalysts have been reviewed and the relationship between cross-linking of the polymer and catalytic activity has been discussed. ... 

Supported catalysts are of a considerable industrial interest and are the subject of many studies most of them are formed by transition metals or metal ions attached to polymers. They have been used for hydrogenations, hydroformylations, hydrosilylations and oxidations thus thio salts have been oxidized by poly(vinylpyridine)-bound copper complexes. ... 

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