ROTATIONAL ANALYSIS OF A-E AND E-E VIBRONIC BANDS OF $CF_{3}S$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/13518

Files Size Format View
1996-RC-10.jpg 103.2Kb JPEG image

 Title: ROTATIONAL ANALYSIS OF A-E AND E-E VIBRONIC BANDS OF $CF_{3}S$ Creators: Yang, Min-Chieh; Powers, David E.; Carter, Christopher C.; Williamson, James M.; Miller, Terry A. Issue Date: 1996 Publisher: Ohio State University Abstract: Rotationally resolved spectra of jet-cooled $CF_{3}S$ have been obtained. The rotational analysis of the origin band shows that it is an a-e type vibronic transition. This is also consistent with the $\tilde{A}^{A}_{1}-\tilde{X}^{2}E$ electronic transition, expected for molecules of this type. This indicates that $CF_{3}S$ has nominal $C_{3v}$ symmetry in both its ground and first excited electronic state. In addition to the origin band, several transitions to exited vibrational levels of the A state have been observed. Some of these transitions are vibronically a-e while others appear to be e-e, presumably induced by Jahn-Teller interaction in the $\tilde{X}$ state. The analysis of an e-e band proves to be a challenge. Its appearance is quite different from that of the a-e bands. The rotational structure of the a-e band is very congested since the entire band spans only $4 cm^{-1}$. However, the e-e band spans more than $7 cm^{-1}$ with a concomitant decrease in line density. Most of the observed rotational lines in the e-e band belong to Q branches. The P and R branches do exist but the intensities are much weaker than the corresponding Q branches. The details of analysis will be presented. Description: Author Institution: Department of Chemistry, The Laser Spectroscopy Facility, The Ohio State University URI: http://hdl.handle.net/1811/13518 Other Identifiers: 1996-RC-10