Anomalous polarization in the resonance Raman spectra of acetylene–cumulene dehydro annulenes
✍ Scribed by Etsuko Fujimoto; Nobuaki Yoshimizu; Shiro Maeda; Masahiko Iyoda; Masazumi Nakagawa
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 312 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0377-0486
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✦ Synopsis
Abstract
Anomalous polarization (ρ = 3/4 ˜∞) has been observed in the resonance Raman spectra of some acetylenecumulene dehydro annulenes of a D~2__h__~ rectangular configuration. Because of no orbital degeneracy, the observed anomaly may certainly be explained by the vibronic coupling of the resonant level with nearby states. From the nature of those relevant electronic levels, the anomalous lines are assigned to the B~1__g__~ modes of vibration. For a typical anomalous polarization case, the polarization dispersion and excitation profile have been investigated.