Chelates of vanadium(V) with organic hydroxy compounds in aqueous solutions

Abstract

The formation of vanadium(V) complexes has been examined potentiometrically by the method of acidimetric titrations of aqueous solutions at pH 7-5. The composition has been determined and the formation constants have been calculated for the oxalate chelates VO2Ox23- and VO2Ox . (OH)2-, the maltol chelate VO2A2-, the ternary complex VO2OxA2-, and for binuclear and tetranuclear complexes with tartarate, glycolate, sorbitol, and mannitol. The structure of the complexes is discussed in terms of the consumption of protons for their formation.