Electron‐Transfer‐Induced Conformational Changes. The Example of 1,8‐Dimethyl[14]annulene

Abstract

Listen

Translate article

AbstractThis communication reports ESR‐spectroscopic investigations of the radical anion of 1,8‐dimethyl[14]annulene (1) which possesses a flexible molecular framework allowing configurational and conformational mobility. The ESR and ENDOR spectra indicate that at higher temperatures (T > 160 K), \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{- \atop \dot{}} $\end{document} exists as a mixture of several distinct isomers. One of them, the sole product at T < 160 K, is found to be energetically preferred. The configuration and the conformation of this species can be determined by interpretation of the hyperfine data in terms of a singly occupied MO of the 14‐membered π‐perimeter.