Raman-vibronic double-resonance spectroscopy of benzene dimer isotopomers
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90024-1569 (United States)
The results of Raman-vibronic double resonance experiments on benzene dimer are reported. The results were obtained by mass-selective, ionization-detected stimulated Raman spectroscopies. The data pertain to the {nu}{sub 1}, {nu}{sub 2}, and {nu}{sub 6} fundamentals of numerous dimer isotopomers. The results are discussed in terms of the geometry of the dimer. They show that the species is characterized by two inequivalent benzene sites with one of the sites of low and the other of higher symmetry. These two sites give rise to different Raman resonance frequencies, different vibrational dynamics, and markedly different {ital S}{sub 1}{leftrightarrow}{ital S}{sub 0} vibronic spectra. It is argued that all of the experimental results are consistent with a T-shaped equilibrium geometry in which the benzene moiety at the top of the T is freely rotating about its {ital C}{sub 6} axis.
- DOE Contract Number:
- FG03-89ER14066
- OSTI ID:
- 7038989
- Journal Information:
- Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 97:4; ISSN JCPSA; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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