Intensities in polarized light: A1g → B2u transition in hexamethylbenzene
✍ Scribed by Cristos Stremmenos; Carlo Zauli
- Book ID
- 103199524
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 713 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0022-2852
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The three-photon spectrum of the 'Bzu-l Alg transition in gas-phase benzene has been recorded and analyzed. Though formally allowed at the three-photon level, this transition is seen to be entirely vibronically induced. The last unknown e2g vibration (vg) in the 'Bzu state is identified.
The transition linewidth AE in crystal C I' 6 J6, C6D6 and symC6H3D3 has been measured as a function of temperature T from 4.2 to 135"K, and it extrapolates to a common value of tie = 50 cm-' at 0°K. In CbH6 aE = (50+ 7T"2) cm-', indicative of strong cxciton-phonon couplin g, and there is a line shi
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