Abstract
Polarographic reduction against (C2H5)4NBr as background in dimenthyformamide has been applied to 17 anthraquinones with α- and Β-substituents. There are two pronounced half-waves, which correspond to two one-electron degrees of reduction, a semiquinone anion being formed as intermediate. An ESR signal is produced when this radical is formed by electrolysis with a cathode potential equal to E1/2. The observed E1/2 fit Hammett's equation closely. The relation E1/2 to donor-acceptor aspects of the substituents is discussed.
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Brodskii, A.I., Gordienko, L.L. Substituent effects in the one-electron reduction of anthraquinone derivatives. Theor Exp Chem 1, 294–296 (1967). https://doi.org/10.1007/BF00526346
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DOI: https://doi.org/10.1007/BF00526346