Summary
The kinetics of the iodine-catalysed reaction of vanadium(V) with arsenious acid in dilute H2SO4, leading to the formation of vanadium(IV) and arsenic acid, have been investigated spectrophotometrically. Plausible pathways consistent with the experimental rate law are discussed. An iodine bridged activated complex between reactant and substrate species is proposed to explain the electron mobility from arsenic to vanadium by ‘resonance transfer’. Applying other criteria, the heterolytic dissociation of the vanadium-iodine bond of the activated complex is considered rate-controlling.
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Sriramam, K., Sreelakshmi, J. & Ramadevi, L. Kinetics of iodine-catalyzed reduction of vanadium(V) by arsenic(III). Transition Met Chem 15, 126–131 (1990). https://doi.org/10.1007/BF01023901
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DOI: https://doi.org/10.1007/BF01023901