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Oxidation of indole-3-acetic acid by peroxomonosulphate: A kinetic and mechanistic study

✍ Scribed by G. Chandramohan; S. Kalyanasundharam; R. Renganathan

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 127 KB
Volume: 34
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.10060

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✦ Synopsis

Abstract

Kinetics of oxidation of indole‐3‐acetic acid (IAA) by peroxomonosulphate (PMS) in aqueous acetonitrile medium has been investigated. The reaction follows a total second order, first order each with respect to [IAA] and [PMS]. The rate of the reaction was not affected by added [H^+^]. Variation of ionic strength (μ) had no influence on the rate. Increase of percentage of acetonitrile decreased the rate. Absence of any polymerization indicated a nonradical pathway. Activation and thermodynamic parameters have been computed. A suitable kinetic scheme based on these observations is proposed. The reactivity of PMS towards IAA was found to be higher than that with peroxodisulphate. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 34: 569–574, 2002

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