Visible Absorption Spectra of Diaryl Carbonyl Radical Anions

✍ Scribed by Elżbieta Wagner-Czauderna; Sławomir Filipek; Robert Lipka; Marek K. Kalinowski

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 99 KB
• Volume: 57
• Category: Article
• ISSN: 0026-265X
• DOI: 10.1006/mchj.1997.1488

✦ Synopsis

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 in N,N-dimethylformamide solutions. It has been found that the Hammett-Streitwieser equation describes the wave number (n ˜max ) of the first intense bands in terms of the position constant (s / r ) appropriate for the aryl skeleton attached in its r position to the carbonyl group. A satisfactory linear correlation in the form n ˜max Å (01.68 { 0.96) 1 10 3 Ss / r / (13.48 { 0.39) 1 10 3 exists for the members of the reaction series.