Mechanism of the oxidation of the molybdenum(V)–ethylenediaminetetra-acetato dimer by hexachloroiridate(IV) and tris(1,10-phenanthroline)iron(III)
Abstract
The kinetics of the oxidation of µ-NN′-ethylenediaminetetra-acetato-di-µ-oxo-bis[oxomolybdenurn(V)], [Mo2O4(edta)]2–, by hexachloroiridate(IV), [IrCl6]2–, have been studied in aqueous perchloric acid solutions, I= 1.0M (LiClO4), at 15–30 °C. The reaction is first-order in both reactants and is independent of [H+] in the range 0.01–0.50M investigated. Pseudo-first-order rate constants. kobs, obtained by monitoring the disappearance of [IrCl6]2– are substantially lower in the presence of added hexachloroiridate(III), [IrCl6]3–. The experimental data give a good fit to (i).