Visible Absorption Spectra of Diaryl Carbonyl Radical Anions

Visible absorption spectra are reported for a series of anion radicals of diaryl carbonyl compounds. The radicals were generated by electrolytic reduction of benzophenone,p-phenylbenzophenone, and 1-naphthylphenyl and 2-naphthylphenyl ketones as well as di-1-naphthyl and di-2-naphthyl ketones inN,N-...

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Bibliographic Details
Published in:Microchemical journal 1997-09, Vol.57 (1), p.52-58
Main Authors: Wagner-Czauderna, Elżbieta, Filipek, Sławomir, Lipka, Robert, Kalinowski, Marek K.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Free radicals chemistry
Organic chemistry
Reactivity and mechanisms
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Summary:Visible absorption spectra are reported for a series of anion radicals of diaryl carbonyl compounds. The radicals were generated by electrolytic reduction of benzophenone,p-phenylbenzophenone, and 1-naphthylphenyl and 2-naphthylphenyl ketones as well as di-1-naphthyl and di-2-naphthyl ketones inN,N-dimethylformamide solutions. It has been found that the Hammett–Streitwieser equation describes the wave number (ν̃max) of the first intense bands in terms of the position constant (σr+) appropriate for the aryl skeleton attached in its r position to the carbonyl group. A satisfactory linear correlation in the formν̃max;eq (−1.68 ± 0.96) × 103Σσr+ (13.48 ± 0.39) × 103exists for the members of the reaction series.
ISSN:0026-265X
1095-9149
DOI:10.1006/mchj.1997.1488