Department of Chemistry, S. V. University, Tirupati-517 502 Manuscript received 11 February 1988, accepted 6 April 1988 Substituted-phenacyl bromides, such as m-nitro, p-phenyl, p-methyl, p-methoxy and m-methoxyphenacyl bromides have been reduced electrochemically at dropping mercury electrode and hanging mercury drop electrode using d c. polarography and cyclic voltammetry in 50% (v/v) ethanol- water and DMF- water mixtures. Comparative account of their reduction behaviour in different buffer

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... ystems is discussed. The effect of solvent on the reduction process and the possible general reduction mechanism are discussed. The kinetic parameters, such as diffusion coefficients and forward rate constant values have been evaluated and reported.