IN a number of publications1,2 it has been established that the reduction potential of aromatic compounds may be correlated with the π-electron energy change associated with the localization of electron or electrons at different positions of the molecule. Thus in the reduction of quinones the electron-localization took place at the two oxygen atoms, while in the case of aromatic hydrocarbons they were localized at the two p-carbon atoms. In the case of more complex compounds the localization may take place at certain groups of atoms undergoing reduction.
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BASU, S., CHAUDHURI, J. Group Localization Energy and Polarographic Half-Wave Potentials of Aromatic Nitro Compounds. Nature 180, 1473–1474 (1957). https://doi.org/10.1038/1801473b0
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