Abstract

Avinash Kumar, Mukesh Kumar Jha and Ashok Kumar Jha*

Kinetics of oxidation of Glutamic acid with Bi(V) in aqueous phosphoric acid medium has been studied. The reaction is first order with respect to the oxidant and it is complex one with respect to substrate. The mode of electron transfer is through an intermediate to be formed in two equivalent step taking decarboxylation of a– carboxylic group. The stoichiometry of the oxidant of glutamic acid by Bi(V) corresponds to the reaction represented by the equation COOH NH3+ | | CH2 – CH2– CH – COOH + Bi(V) + H2O COOH | ? Bi(III) + CH2 –CH2 – CHO + NH3 + CO2 + 3 H+ The observed kinetic rate law is given by the equation – d[Bi(V)] k K [Bi(V)] [GA] 1 ––––––––– = ––––––––––––––– . ––––––––––– dt 1 + K [GA] 1 + kp [H+] A plausible reaction mechanism corresponding to the rate law2 has been proposed.

Kinetics; Glutamic; aqueous; phosphoric

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