ABSTRACT
Both the peroxovanadates and the hydroxamidovanadates readily undergo reactions with heteroligands. Such ligands may be either mono-or bidentate, and often bidentate ligands react in a monodentate fashion with the individual functional groups. Heteroligand reactions frequently occur without displacement of the peroxo-or hydroxamido groups, but certainly displacement of a ligand can occur. There is little evidence to suggest that monodentate heteroligands cause a change in coordination geometry from that of the parent complex. However, complexation of bidentate heteroligands may result in expansion of the coordination sphere rather than in expulsion of a peroxo (or hydroxamido) ligand. The chemistry of the peroxovanadates can be significantly different from that of the hydroxamidovanadates, particularly with ligands susceptible to oxidation. For instance, unlike hydroxamidovanadate, peroxovanadate very rapidly oxidizes thiolate groups, apparently with formation of a sulfinic acid [1].
