Electronic absorption and E.S.R. spectra of the benzene and paracyclophane anions
- 1 January 1967
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 12 (1) , 1-12
- https://doi.org/10.1080/00268976700100011
Abstract
The electronic absorption and E.S.R. spectra of the benzene and 2,2-paracyclophane anions were measured. The paracyclophane anion showed a strong absorption band at 760 mμ and an E.S.R. pattern with hyperfine structures of 41 lines. On the other hand, the benzene anion had an absorption peak at 420 mμ and an S.E.R. spectrum with hyperfine structures of seven lines. Combining these experimental results with a molecular orbital calculation taking account of configuration interaction, we were led to the conclusion that there exists an electron resonance interaction between the π electron systems belonging to the two benzene rings of the paracyclophane anion and that the exchange interaction energy between them amounts to 0·82 ev. Furthermore, the 760 mμ band was interpreted to be a charge-(or electron) resonance absorption caused by the electron-resonance interaction. The π-electron structure of the biphenyl anion was also studied theoretically and the result was compared with that for the paracyclophane anion.Keywords
This publication has 17 references indexed in Scilit:
- Molecular Complexes between 1,2,4,5-Tetracyanobenzene and Some Aromatic Electron DonorsJournal of the American Chemical Society, 1966
- Electron Transfer between Anion Radicals and Neutral Molecules as Revealed by Electron Spin Resonance SpectraBulletin of the Chemical Society of Japan, 1965
- Dimethylenedihydroheteroaromatic Compounds and Heterocyclophanes by 1,6-Hofmann Elimination ReactionsJournal of the American Chemical Society, 1960
- INTRAMOLECULAR ELECTRON EXCHANGE IN ANIONS OF PARACYCLOPHANES1Journal of the American Chemical Society, 1958
- Electron Spin Resonance Spectra of the Anions of Benzene, Toluene and the Xylenes1Journal of the American Chemical Society, 1958
- Electronic spectra of alternant hydrocarbon mononegative ionsRecueil des Travaux Chimiques des Pays-Bas, 1957
- Macro Rings. XII. Stereochemical Consequences of Steric Compression in the Smallest Paracyclophane1Journal of the American Chemical Society, 1955
- Macro Rings. VII. The Spectral Consequences of Bringing Two Benzene Rings Face to Face1Journal of the American Chemical Society, 1954
- Molecular Compounds and their Spectra. IIJournal of the American Chemical Society, 1952
- Macro Rings. I. Preparation and Spectra of the ParacyclophanesJournal of the American Chemical Society, 1951