Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Electrochemical Reduction of Nitrobenzene and Substituted Nitrobenzenes on Lead Electrode

  • Published : 1981.03.30
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Abstract

Electrochemical reduction of nitrobenzene and substituted nitrobenzenes on lead electrode was studied by galvano-static measurements and cyclic voltammetry in basic ethanol-water solvents. Nitroso compounds or hydroxylamines were detected as the main reduction product depending on the potential. Mechanisms of production and further reduction of substituted and unsubstituted nitrosobenzenes are deduced from Tafel slope, pH dependence and reaction order. The reduction of most of the substituted nitrobenzenes to corresponding nitrosobenzene derivatives seemed to follow the reaction mechanism of nitrobenzene reduction with a few exceptions. A Hammett type relationship between the magnitude of the reduction current and the kinds of substituents was found with the ${\rho}$ value of 0.54.

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