COMPARATIVE STUDY OF OXIDATION OF L-CYSTEINE AND DL- METHIONINE BY POTASSIUM PERMANGANATE IN ALKALINE MEDIUM
AbstractKinetics of oxidation of L-cysteine and DL- Methionine by potassium permanganate in alkaline medium was studied spectro-photometrically at room temperatue. The reaction was found to be of first order with respect to amino acid, zero order with respect to oxidant and fractional order dependence on Alkali. It was found that the rate of the reaction increases with increase in concentration of [OH-]. There is a good agreement between observed and calculated rate constant under experimental conditions. The activation parameters are computed with respect to the slow step of the reaction. Cysteine exhibits relatively consistent kinetic behavior than Methionine. The oxidation product of the reaction was found to be cysteine and Methionine sulfoxide. A plausible reaction mechanism has been proposed for the experimental results.
Article Information
28
2403-2410
772 KB
24
English
IJPSR
Hemlata Sahu * and Sandhya Rani Panda
Govt. D. B. Girls P. G. Autonomous College, Raipur, Chhattisgarh, India.
hemlatasuryansh16@gmail.com
23 March 2025
06 April 2025
15 April 2025
10.13040/IJPSR.0975-8232.16(8).2403-10
01 August 2025
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