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Electron transfer reactions of V(IV) with Cl(I), Br(I) and I(I). A kinetic study

✍ Scribed by P. S. Radhakrishnamurti; C. Janardhana; G. P. Behera; G. K. Mohanty


Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
398 KB
Volume
14
Category
Article
ISSN
0538-8066

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✦ Synopsis


Abstract

A kinetic study on the oxidation of V(IV) by chloramine‐T (CAT) at pH 6.85 by N‐bromo succinimide (NBS) in aqueous acetic acid–perchloric acid media and by N‐iodo succinimide (NIS) in aqueous perchloric acid medium has been carried out. In all the systems studied the order with respect to the oxidant is unity. NBS and CAT oxidation reactions exhibited Michaelis–Menten type kinetics, and the NIS study indicated unit dependence on [substrate]. Independence on acidity has been observed in the case of CAT and NBS reactions, but NIS reactions exhibited inverse unit dependence on [acid]. Novel solvent influences have been noticed in the case of CAT reactions, but with NIS and NBS reactions retardation in the rate has been observed with an increase in the percentage of acetic acid. Plausible mechanisms consistent with the results have been postulated, and suitable rate laws in consonance with the postulated mechanisms have been derived.


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