Special features of the electrochemical reduction of aryl- and acylhydrazones of aromatic aldehydes in dimethylformamide

1. Electrochemical reduction of arylhydrazones of aromatic aldehydes begins with fragmentation at the N-N bond, whereas in the case of acylhdyrazones saturation of the azomethine bond precedes the fragmentation. 2. The contrast in the electroreduction of these types of hydrazones is determined by the difference in character of the lowest free MO of the hydrazone fragment; in acylhydrazones in contrast to arylhydrazones the orbital of the unshared pair of the amine nitrogen atom does not participate in the formation of this orbital.