Kinetics and Mechanism of Oxidation of Benzaldoxime and Substituted Benzaldoximes by Chloramine-T In Acid Medium

S. Ramakrishna, Afzal Ali Siddiqui and Sushma Kandlikar

Department of Chemistry, Nizam College, Osmania University, Hyderabad-500 001 India.

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ABSTRACT:

Kinetics of oxidation of a series of four benzaldoximes by chloramine-T (CAT) in acid medium has been studied at different tempratures. The reactions showed first order dependence on [CAT] and [H+] and zero order in [substrate]. The rates of oxidation have negligible effect by the addition of the sale The rate of the substiiuents increased in the order : p-OMe > H > m-OMe > m-Cl. The probable mechanism constating of the formation of [HOCJ] as a slow step has been suggested, Kth the products being the corresponding aldehydes. Activation parameters have been computed.

KEYWORDS:

Mechanism; Benzaldoximes