Abstract

Abstract This review deals with the preparation and structure investigation of metal carbonyl (Cr, Mo, W, Fe) complexes with 9,10-disiladihydroanthracene ( I ), 9-silafluorene ( II ), 9-oxa-10-siladihydrophenanthrene ( III ), 1-silaacenaphthene ( IV ), 1-silaphenalene ( V ) and 1-silacyclohexa-2,4-diene ( VI ) π -ligands. Some questions concerning the regio- and stereo-regularities of η -coordination are considered. The most interesting properties and structural peculiarities of the new complexes are summarized: the relationship between the nature of the substituent in the sila-unit and the chemical behaviour of the complexes; the dependence of the silacycle conformation on substitution and coordination factors; the specific arrangement of M(CO) n -fragments in crystals.

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