Electrochemical characteristics of anthrapyridone and its derivatives

A mechanism is proposed for the electrical reduction of anthrapyridone and its derivatives on a dropping mercury electrode in anhydrous dimethylformamide. Parallelism in the electrochemical behavior, under the indicated conditions, or anthrapyridone and anthraquinone derivatives was noted. A linear correlation of the half-wave potential with the calculated energies of the lower vacant molecular orbital by the Hückel MO LCAO method within the Pariser-Parr-Pople approximation was found. The half-wave potentials correlate satisfactorily with the enthalpies of the intramolecular hydrogen bond of the investigated compounds.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1386–1390, October, 1976.