ChemInform Abstract: Oxidation of Sulfur(IV) by Dodecatungstocobaltate(III) in Aqueous Acid Solution.

Abstract

023ChemInform Abstract The reaction between (CoW12O40)5-and sulfite is studied in the pH range 1.5-3.5 at 25 rc C and a ionic strength of 0.5 M (NaClO4). The stoichiometric results show that one-electron reduction of the complex by S(IV) is preferred at high S(IV) concentrations, while a two-electron reduction is observed simultaneously with the one-electron reduction when an excess of the Co(III) complex is used. A redox mechanism is proposed and discussed.