Electrochemical behaviour of some substituted thiadiazoles

The redox characteristics of 5-aroyl-2-imino-3-phenyl-2, 3-dihydro-1, 3, 4-thiadiazoles (la-e), 5-benzoyl-2-imino-3-aryl-2, 3-dihydro-1, 3, 4-thiadiazoles (2b-e) and 2-imino-3, 5-disubstituted-2, 3-dihydro-1, 3, 4-thiadiazoles (3b-e) has been investigated in nonaqueous acetonitrile at platinum and gold electrodes. Through controlled potential electrolysis, the oxidation and reduction product of each class of compound can be separated and identified. The product of oxidation of substituted thiadiazoles 1-3 (a-e) was found to be a dimer while that of reduction is a stable anion radical.