Kinetics of reactions of catechol (o-dihydroxybenzene) and quinol (p-dihydroxybenzene) with oxidizing metal ions present in excess: the reactions with iron(III), vanadium(V), and thallium(III) in aqueous perchloric acid solution

Abstract

The reactions of catechol with excesses of Fe^III, V^V, and Tl^III ions and of quinol with an excess of V^V have been studied by means of a stopped-flow technique in aqueous acid solution (HClO₄) at 25·0 °C. Kinetic dependences on the reagent concentrations, different from those obtained in the presence of excess of the dihydroxybenzene, have been found for the reactions with Fe^III and V^V ions, while the same kinetic dependence has been found for the reaction with Tl^III. Proposed schemes of reaction are discussed.