Electrochemical and chemical reduction studies of molybdenum(VI)-and molybdenum (V)-ethylenediaminetetraacetic acid complexes

Abstract

The electrochemical reduction characteristics of the molyb-denum(VI)-and molybdenum(V)-ethylenediaminetetraacetate complexes, [(MoO₃)₂Y]^4- and [Mo₂O₄Y]^2- respectively have been investigated as a function of pH and free ligand concentration. The nature of chemical reduction of these two complexes with sodium borohydride and sodium dithionite have also been studied in acetate and borate buffers. The electroactive species undergoing electrode reductions have been ascertained by analysing polarograms of the complexes. A mechanism has been proposed to account for the differences observed in the reactivities of these two complexes.