Organic compounds of silicon with non-standard types of coordination

Abstract

The structures of organosilicon compounds in whichthe coordination number of silicon is other than 4 are examined.Derivatives of pentacoordinate silicon, in which silicon has atrigonal-bipyramidal geometry, have been most thoroughlyinvestigated among them. Appreciably much less information isavailable about the unstable derivatives of tricoordinate silicon,whose structure is close to being planar. Examples of compounds inwhich the coordination number of silicon is greater than five are alsoexamined. Attention is concentrated on the geometry of compoundswith an increased coordination number of silicon atoms asintermediates in chemical reactions. The bibliography includes 111 references.