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Conformation and hyperconjugation in β-substituted alkyl radicals

✍ Scribed by M.C.R. Symons

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
226 KB
Volume
16
Category
Article
ISSN
0040-4039

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✦ Synopsis

New experimental results pertaining to p-group (ML3) interaction in radicals of type R2C-CH2ML3 have led Griller and Ingold(1) to conclude that the theory involving 0-n hyperconjugation, invoked by Lyons and Symons(2) to explain the conformation exhibited by certain radicals of this type, must be rejected. Since I have been responsible, not only for this recent suggestion(2), but also for the original hypothesis that p-proton hyperfine coupling arises as a result of hyperconjugation(3), it seems appropriate that I should attempt to explain why this conclusion(l) seems to me to be less than compelling. Indeed, I will try to show that the new results actually accord well with predictions based on this theory. The present situation is as follows:

📜 SIMILAR VOLUMES

Conformational Study by ESR. of Some Alk
Conformational Study by ESR. of Some Alkyl Substituted 6a-Thiathiophthene Radical Anions
✍ Fabian Gerson; Josef Heinzer; Madeleine Stavaux 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 444 KB

## Abstract ESR. data are reported for the radical anions (II^⊖^ to VI^⊖^) of five alkyl substituted __6a‐thiathiophthenes__. Rates and activation parameters for the inversion of the 3,4‐trimethylene chain in IV^⊖^, V^⊖^ and VI^⊖^ have been obtained by means of an iterative least squares computer p