Electron transfer reactions of vanadium(IV) with some oxyanion oxidants in aqueous perchloric acid. Part I. Reaction with chromium-(VI) and manganese(VII)

Abstract

The rate law k[Cr^VI][V^IV]²[H⁺]ⁿ/V^V], with n < 1, is confirmed, and differences from the iron(II)–chromium(IV) result are explained. With proper interpretation the comparability of iron(II) with vanadium(IV) reactions is preserved. The reaction of vanadium(IV) with manganese(VIII) appears to be initially just of the second order, but non-stoicheiometry and acceleration by product manganese(II) introduce later complications only qualitatively resolvable.