ELECTRON-TRANSFER REACTIONS OF NICKEL(III) AND NICKEL(IV) COMPLEXES

This review narrates the electron transfer reactions of various nickel (III) and nickel(IV) complexes reported during the period 1981 until t oday. The reactions have been categorized mainly with respect to the t ype of nickel complexes. The reactivity of nickel(III) complexes of ma crocycles, 2,2'-bipyridyl and 1,10-phenanthroline, peptides and oxime- imine, and of nickel(IV) complexes derived from oxime-imine, oxime and miscellaneous ligands with various organic and inorganic electron don ors have been included. Kinetic and mechanistic features associated wi th such interactions have been duly analyzed. The relevance of Marcus cross-relation equations in the delineation of the electron transfer p aths has also been critically discussed. (C) 1998 Elsevier Science S.A .