EPR and polarography of nitroazoles. 5. First step in the electrochemical reduction of 2-substituted 5(6)-nitrobenzimidazole using a rotating platinum ring-disk electrode |
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Authors: | V. A. Lopyrev L. I. Larina I. M. Sosonkin T. I. Vakul'skaya G. L. Kalb E. F. Shibanova |
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Affiliation: | (1) Irkutsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, 6640-3 Irkutsk;(2) All-Union Scientific-Research and Design Institute for Monomers, 300026 Tula |
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Abstract: | Using a rotating platinum ring-disk electrode, the electrochemical reduction of 2-substituted 5(6)-nitrobenzimidazoles at the platinum disk in acetonitrile and the oxidation of their radical anions at the ring were studied. During the reduction molecular hydrogen forms by a bimolecular reaction of two primary radical anions. The correlating of electrochemical quantities with the I, R, and substituent constants are evidence that E12/ddepends on substituent resonance and induction effects to about the same extent, whereas ilimd, n, and E12/rdepend predominantly on the resonance effect.For Communication 4, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 827–832, June, 1985. |
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