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

✍ Scribed by Walter Huber

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: German
• Weight: 343 KB
• Volume: 67
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19840670523

✦ Synopsis

Abstract

This 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.