Metalasiloxanes: New structure formation methods and catalytic properties

This article is a review of present-day methods of the formation of the structure of various metalasiloxanes (MS's). Methods of designing the structure of catalytically active MS's are discussed. In the description of synthetic methods and catalytic properties, the MS's are divided into two groups, namely, individual and oligomeric MS's. The first section of the review is devoted to MS's with coordinatively unsaturated metal sites and to cagelike MS's. The methods of formation of MS-based catalytic surfaces are analyzed, and synthetic methods converting these surfaces into ordered inorganic catalytic systems are discussed. The second section of the review presents the methods of synthesis of MS oligomers, the ways of regulating the structure of these compounds, and the use of the MS's as the basic component of catalytic systems for petrochemical syntheses and halohydrocarbon conversion.