LEWIS ACIDITY, HYDROLYSIS, REDUCTION AND ALKYLATION OF TETRACHLORO-PENTAMETHYLCYCLOPENTADIENYL NIOBIUM AND TANTALUM COMPLEXES AND INSERTIONOF ISOCYANIDES INTO METAL-METHYL BONDS

This article is a review of the contributions from our research group to the chemistry of the title compounds. Studies related with the form ation of adducts, hydrolysis leading to different oxo- and hydro- comp ounds, reduction to lower oxidation states, the behaviour of the reduc ed species in reactions with various ligands and oxidizing agents as w ell as alkylation and insertion reactions of isocyanides into metal-me thyl bonds are summarized.