Kinetics and mechanism of the oxidation of methionine by quinolinium chlorochromate

The oxidation of methionine by quinolinium chlorochromate (QCC) has been studied, in the presence of chloroacetic acid, and in water-acetic acid mixtures of varying mole fractions. The reaction is first order with respect to methionine, QCC and acid. The reaction rates were determined at three diffe...

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Bibliographic Details
Published in:Journal of the Serbian Chemical Society 2005-01, Vol.70 (2), p.145-151
Main Authors: Pandeeswaran M., Bincy John, Bhuvaneshwari D.S., Elango K.P.
Format: Article
Language:English
Subjects:
kinetics
mechanism
methionine
oxidation
Online Access:Get full text
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Summary:The oxidation of methionine by quinolinium chlorochromate (QCC) has been studied, in the presence of chloroacetic acid, and in water-acetic acid mixtures of varying mole fractions. The reaction is first order with respect to methionine, QCC and acid. The reaction rates were determined at three different temperatures (25, 35 and 45 °C) and the activation parameters were computed. The reaction rate increased with increasing mole fraction of acetic acid in the mixture and specific solvent-solvent-solute interactions were found to predominate (81 %). A solvation model and a suitable mechanism for the reaction are postulated.
ISSN:0352-5139
1820-7421
DOI:10.2298/JSC0502145P