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Abstract

KINETICS OF OS (VIII) CATALYZED OXIDATION OF ALANINE BY FERRATE (VI) IN ALKALINE MEDIUM

Sheila Srivastava* and Dharmraj Prajapati

ABSTRACT

Spectroscopic investigations on Os(VIII) catalysed oxidation of alanine by in basic medium have been carried out at room temperature (30oC).The rate of oxidation shows a first-order dependence on oxidant,catalyst, Os(VIII). Small increase in rate of reaction is observed with the increase in concentration of OH- & [S] i.e., positive effect of increase of [KOH] & [S] is observed. Negligible effect of addition of [KCl] and [KNO3] on rate is observed. [OsO4(H2O)2] and are proposed to be the reactive species of Os (VIII) and Fe (VI) respectively in the present investigation. Acetaldehyde is found to be main product of the reaction
along with carbondioxide & ammonia as by products. On the basis of experimental findings, a suitable mechanism consistent with the observed kinetics is proposed and the rate law has been derived on the basis of obtained data.

Keywords: Alanine, Os (VIII) catalysis, Oxidant Ferrate (VI) and Kinetics.


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