Steric and electronic effects on the redox potentials of benzophenone radical anions
1980; Elsevier BV; Volume: 106; Linguagem: Inglês
10.1016/s0022-0728(80)80179-3
ISSN2590-2954
AutoresJames Grimshaw, Robert A. Hamilton,
Tópico(s)Photochromic and Fluorescence Chemistry
ResumoRedox potentials (vs. sce) have been measured for o- and p-methyl substituted benzophenone, radical anion couples in dimethylformamide and the data interpreted with the aid of previous work of the UV-spectra of benzophenones. The results are explained by the electronic effect of the methyl group and the steric effect of o-groups which increases the average tilt of a phenyl ring with respect to the plane of the carbonyl function. The electronic effect of a p-methyl depends on the average tilt of the phenyl ring.
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