Electrochemical behaviour of 1-thieocarbohydrazide 3-methyl 4-(4′-substituted aryl hydrazono) pyrazoline-5-ones

Electrochemical behaviour of 1-thieocarbohydrazide 3-methyl 4-(4'-substituted aryl hydrazone) pyrazoline-5-ones have been investigated at dme and gc electrodes in Britton-Robinson buffer solution of pH 2.1 to 10.1 using dc polarography and cyclic voltammetry. The reduction gives one well defined wave in the pH range 2.1-10.1. The process is irreversible and diffusion controlled. Preparative controlled potential electrolysis indicates that aromaticamine and 1-thieocarboamide 3-methyl pyrazoline-5-ones are products of electrolysis. The mechanism of the reduction has been deduced.