Kinetics and mechanism of electron transfer reactions of aquo‐thallium(III) and coordinated thallium(III). Reduction of thallium(III) and chlorothallium(III) complexes by L‐ascorbic acid in aqueous acid medium

Abstract

AbstractThe stoichiometry of the reaction of TIIII with ascorbic acid (H2A) in the presence and absence of chloride ion conforms to TIIII + H2A > TII + 2H+ + A. where A is dehydroascorbic acid. The reaction exhibits complex kinetics and the reactivity of various chlorothallium (III) species decreases in the order of [TIOH]2+ > TI3+ > [TICI]2+ > [TICI2]+ > TICI3 > [TICI4]−. The mass balance relationship was employed to calculate the equilibrium concentration of the chloride ion for evaluation of the rate constants.