The kinetics of the title reactions have been studied using the discharge-flow mass spectrometic method at 296 K and 1 torr of helium. The rate constant obtained for the forward reaction (1), using three different experimental approaches (kinetics of Br Br ϩ IBr : I ϩ Br 2 consumption in excess of
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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