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Title:VIBRATION-TORSION-ROTATION INTERACTIONS IN MOLECULES WITH A C3v TOP AND Cs FRAME: vt=3,4 TORSIONAL AND C–S STRETCHING VIBRATIONAL STATES OF METHYL MERCAPTAN CH3SH
Author(s):Ilyushin, V.
Contributor(s):Bekhtereva, Elena ; Sydow, Christian ; Maul, Christof ; Bauerecker, Sigurd ; Schlemmer, Stephan ; Lewen, Frank ; Müller, Holger S. P.; Zakharenko, Olena ; Bakhmat, Yan ; Alekseev, E. A.
Subject(s):Large amplitude motions, internal rotation
Abstract:We present\footnote{This work was done under support of the Volkswagen foundation. The assistance of Science and Technology Center in Ukraine is acknowledged (STCU partner project P686). The work in K{\"o}ln was supported by the Deutsche Forschungsgemeinschaft (DFG) via SFB~956, project B3, and the Ger{\"a}tezentrum Cologne Terahertz Center.} the results of our analysis of the FIR and microwave spectra of the \nub{8} vibrational state (C-S stretch) of methyl mercaptan \chem{CH_3SH} near 710 \wn. The analysis employs a new program which was recently developed for fitting several isolated small-amplitude fundamentals embedded in a pure torsional bath in molecules like methyl mercaptan, in which the frame has C$_{s}$ symmetry and the methyl top has C$_{3v}$ symmetry. Our study involves the energy levels that belong to the \nub{8} vibrational state itself as well as to v$_t$ = 0, 1, 2, 3, 4 torsional vibrational states of methyl mercaptan. In our analysis we used data available in the literature [1,2,3] as well as the results of the new measurements from Kharkiv, K{\"o}ln, and Braunschweig. In the talk the details of this new study will be discussed. [1] L.-H. Xu, R. M. Lees, G. T. Crabbe, et al., J. Chem. Phys. 137, 104313 (2012). [2] R.M. Lees, Li-Hong Xu, B.E. Billinghurst, J. Mol. Spectrosc. 352, 30-38 (2016). [3] R.M. Lees, Li-Hong Xu, B.E. Billinghurst, J. Mol. Spectrosc. 319, 45-56 (2018).
Issue Date:2019-06-17
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/104224
DOI:10.15278/isms.2019.MI04
Rights Information:Copyright 2019 V. Ilyushin
Date Available in IDEALS:2019-07-15
2020-01-25


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