Polarographic Reduction of Aldehydes and Ketones. I. General Reduction Scheme
Reduction scheme of polarographic reduction of aryl alkyl ketones is discussed. Schemes are summarised for the reduction of the protonized form in acid media, for the two-electron reduction in medium pH-range and for the one-electron steps in alkaline solutions. Kinetics currents resulting in protonations, antecedent the electrode process or interposed between two electrode processes, which play a role in the transition regions of pH, are discussed. The effect of cations on the reduction waves is interpreted. Studied examples of reductions of various types of carbonyl compounds are summarised.