Polarographic Reduction of Some 5,5-Dimethylcyclohexarle- 2-Benzothiazolylhydrazono-1,3-Diones and its 2-Methyl, 4-Methyl, 4-Methoxy, 4-Ethoxy Derivatives

Department of Chemistry, University of Roorkee, Roorkee-247 672 Manuscript received 2 April 1982, accepted 21 July 1982 Polarographic studies of some 5,5-dimethylcyclohexane-2-benzothiazolylhydra­zono-1,3-diones were carried out in B. R. buffer in the pH range 2.0-12.0. All the compounds gave a single, well defined, irreversible, diffusion controlled reduction wave. whose E1/2. was pH dependent but id remained constant throughout the entire pH range. The E1/2, shifted towards negative potential with increase in pH, thereby showing that protonation precedes reduction. The effect of the double layer structure on the E1/2, is also studied