The kinetics of the reaction of aquomanganese(III) ions with hydrogen peroxide in perchlorate media

Abstract

The rapid reaction of Mn(III) with hydrogen peroxide has been investigated spectrophotometrically in perchlorate media using the stopped-flow technique. A new species of Mn(III) is formed rapidly during mixing which then decomposes by a first-order process. Two Mn(III) ions disappear for each H₂O₂ molecule consumed. A mechanism is suggested involving a Mn³⁺HO₂^– complex. Comparison is made with the reactions of Co(III) and Fe(III) with hydrogen peroxide.