Abstract
THE spectra of many aromatic radicals have been summarized by Land1 and Habersbergerova et al.2. The present experiments show a strict correlation between the spectra of some such radicals and their parent aromatic molecules. Cyclohexadienyl radicals derived from benzene and monosubstituted aromatic substances, with side groups directing electrophilic substitution into the o and p positions of the benzene ring, that is, with a negative σ Hammett function, were investigated by Dorfman et al.3. The effects of side groups with positive σ Hammett functions have been investigated only in benzoic acid4,5, nitrobenzene6 and nitrosobenzene7. These observations have now been extended to the hydroxyl, hydrogen and electron adducts of benzaldehyde, acetophenone, benzonitrile and trimethylphenylammonium (TMPA) salt.
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References
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CHUTNY, B. Spectral Correlation of Transients with their Parent Derivatives in Aqueous Solution. Nature 213, 593–594 (1967). https://doi.org/10.1038/213593a0
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DOI: https://doi.org/10.1038/213593a0
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