INFRARED SPECTROSCOPY OF TWO ISOMERS OF THE OCS-CS$_{2}$ COMPLEX
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Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
A second isomer of OCS-CS$_{2}$ complex, with a nonplanar cross-shaped structure, has been studied for the first time by analysing an infrared band in the region of the OCS stretching vibration (2062 cm$^{-1}$). This isomer has C$_{s}$ symmetry and the observed band consists of purely c-type rotational transitions. The ground state rotational parameters are found to be A=0.07306 cm$^{-1}$, B=0.03325 cm$^{-1}$ and C=0.02879 cm$^{-1}$, in good agreement with a previous semi-empirical calculation. \textbf{7}, 487 (2005).} In addition, a hybrid band with a- and b-type rotational transitions has been assigned to be due to the known planar form of OCS-CS$_{2}$, as previously studied by microwave spectroscopy.$^\textit{\scriptsize{a}}$ The spectra were recorded using a rapid-scan tunable diode laser spectrometer to probe a pulsed supersonic jet expansion. Calculations indicate that the planar isomer of OCS-CS$_{2}$ is the lowest in energy, in contrast to CO$_{2}$-CS$_{2}$ where the crossed form is believed to be the lowest. \textbf{102}, 6904 (1998).}
Description
J. J. Newby, M. M. Serafin, R. A. Peebles and S. A. Peebles, \textit{Phys. Chem. Chem. Phys.C. C. Dutton, D. A. Dows, R. Eikey, S. Evans and R. A. Beaudet, \textit{J. Phys. Chem. A
Author Institution: Department of Physics and Astronomy, University of Calgary, 2500 University Dr., N.W., Calgary, Alberta T2N 1N4, Canada; Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada
Author Institution: Department of Physics and Astronomy, University of Calgary, 2500 University Dr., N.W., Calgary, Alberta T2N 1N4, Canada; Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada