ROTATIONAL ANALYSIS OF SUPERSONIC FREE JET SPECTRA OF THE $6^{1}_{0}$ BAND OF \v{A} $^{1}B_{2u}$, BENZENE
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Date
1978
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Supersonic expansion of a benzene/helium mixture prepares benzene in the vibrationless ground state with only the lowest $J = K_{c}$ rotational levels significantly populated. Laser excitation spectra are produced by crossing the free jet with a frequency-doubled, nitrogen laser-pumped dye laser that has a bandwidth of about 1 GHz in the ultraviolet. A comparison is made between molecular constants obtained by our study and those of the band contour analysis of Callomon, Dunn, and $Mills^{1}$ Since spectra have been obtained using both continuous and pulsed supersonic expansion sources, a brief comparison of these techniques will be presented. A rotational analysis of the corresponding vibronic bands of the He-benzene and He2-benzene Van der Waals complexes will also be reported. In contrast to s-tetrazine, $^{2}$ the Van der Waals complexes of the excited state of benzene are less strongly bound than in the ground state.
Description
$^{1}$ J. H. Callomon, T. M, Dunn, and I. M. Mills, Philos. Trans. R. Soc. Lond. A, 259, 499-532 (1966). $^{2}$ R. E. Smalley, L, Wharton, D. H. Levy, and D. W. Chandler, J. Chem. Phys. (in press) (1978).""
Author Institution: Department of Chemistry, Rice University,
Author Institution: Department of Chemistry, Rice University,