Physics – Chemical Physics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jchph..99..890m&link_type=abstract
Journal of Chemical Physics (ISSN 0021-9606), vol. 99, no. 2, p. 890-896.
Physics
Chemical Physics
4
Cyclic Hydrocarbons, Microwave Spectra, Molecular Excitation, Vibrational Spectra, Millimeter Waves, Molecular Structure, Rotational Spectra
Scientific paper
The millimeter-wave rotational spectrum of c-C3H2 in four vibrationally excited states was measured and the rotational and quartic centrifugal distortion constants determined. Of the vibrational states observed here, only nu-3 has been previously detected in the infrared. Assignment of the three new states to nu-6, nu-5, and nu-2 was based on relative intensities, comparison of calculated and measured inertial defects, and symmetry considerations. The spectroscopic constants determined will guide future infrared investigation of c-C3H2, needed for a complete elucidation of the vibrational structure of this molecule. The experimental values of the vibration-rotation coupling constants will allow comparison with theoretical calculations that have recently become feasible for molecules of similar size as c-C3H2. Detection in space of rotational lines from the lowest vibrationally excited states may be possible.
Gottlieb Carl A.
Mollaaghababa Reza
Thaddeus Patrick
Vrtilek Jan M.
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