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Addition of radicals to quinones—I. ESR study of addition products from chloroquinones and free radicals

✍ Scribed by T.L. Simándi; A. Rockenbauer; F. Tüdös


Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
376 KB
Volume
18
Category
Article
ISSN
0014-3057

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✦ Synopsis


The mechanism of addition reactions of radicals formed during thermal decomposition of benzoyl peroxide with various chloro-substituted p-benzoquinones has been studied by the ESR technique in various solvents. The ESR spectra of the intermediate radicals show that addition occurs at the carbonyl oxygen. The important role of charge-transfer complexes in the reaction has been established. For strong CT complexes, the quinone molecule reacts with radicals derived from the solvent.


📜 SIMILAR VOLUMES


Addition of radicals to quinones—III. ES
✍ T.L. Simándi; A. Rockenbauer; F. Tüdős 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 365 KB

Reactions between 2,6-dialkyl-l,4-benzoquinones and various free radicals have been studied by ESR spectroscopy. The stable intermediates were identified on the basis of their spectra. It has been established that cyanoisopropyl, polystyryl and poly-(ct-methylstyryl) radicals attack at the oxygen at

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✍ Tatiana L. Simándi; Antal Rockenbauer; LászlóI. Simándi 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 316 KB

## IReactions of 3,3',5,5'-tetra-ferz-butylstilbene-4,4'-quinone with free radicals from the decomposition of azo compounds and peroxides (R') have been studied by ESR spectroscopy. Relatively stable phenoxyl+,pe free radicals are formed via addition of R' across the exo C=C bond. Their coupling c

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✍ T.L. Simándi; A. Rockenbauer 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 302 KB

The radical reactions of 2,6-di-t. butyl-1,4-benzoquinone with various thermally decomposing azocompounds and peroxides have been studied by ESR. On the basis of the ESR spectra of the intermediate radicals, the mechanism of the reaction is suggested. It was found that, while primary alkyl radicals