Electrochemical reduction of 2-nitrobenzidine in methanol-water mixtures

The electroreduction of 2-nitrobenzidine (2-NB) in buffered methanol-water mixtures in the composition range 20-80% (v/v) and pH range 2.80-12.00 gave a single six-electron diffusion-controlled irreversible wave. On the basis of the results obtained, a diphenoquinone-diimine intermediate is suggested in the mechanism of 2-NB reduction in methanol-water mixtures. © 1986 Indian Academy of Sciences.