Investigation of the electrochemical reduction of certain nitrophenylhydrazones and the anion radicals formed by the methods of ESR and polarography

1. The mechanism of the electrochemical reduction of hydrazones of isomeric nitrobenzaldehydes in dimethylformamide solution and possible chemical reactions accompanying the transfer of an electron to a molecule were considered. 2. The formation of primary and secondary unstable anion radicals was established, their structure was determined, and the delocalization of the unshared electron in them was studied. 3. A quantum chemical calculation was made of the distribution of spin density in the anion radicals studied. A comparison of the data obtained with the experiment permits a rather accurate description of the hyperfine splitting from the nitrogen atom in the hydrazone group.