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Polarographic reduction mechanism and quantum chemical calculations of some α‐arylhydrazononitriles

The polarographic reduction of 2-arylhydrazono-3-keto-3-phenylpropionitriles (I a−i ) and 2-arylhydrazono-3-ketobutyronitriles (II a−i ) over a wide pH range is reported and discussed. The mechanism of the electrode process is elucidated and confirmed via coulometric analysis, quantum chemical calculations and IR spectra of the electrolysis products. The molecular structures and molecular orbital energies were calculated and correlated with the redox potentials of these compounds