Laser Stark spectroscopy of thioformaldehyde in the 10-μm region: The ν3, ν4, and the ν6 fundamentals

doi:10.1016/0022-2852(80)90042-9

Journal of Molecular Spectroscopy

Volume 84, Issue 2, December 1980, Pages 531-558

https://doi.org/10.1016/0022-2852(80)90042-9 Get rights and content

Abstract

The ν₃, ν₄, and ν₆ bands of thioformaldehyde, H₂CS, have been studied using the technique of laser Stark spectroscopy. The H₂CS was produced by the pyrolysis of dimethyl disulfide, and the spectrum was observed using a multipass absorption cell. The band origins are ν₃, 1059.2037 cm⁻¹; ν₄, 990.1866 cm⁻¹; and ν₆, 991.0149 cm⁻¹. The band previously assigned as 2ν₆ has been reassigned as 2ν₂, leading to a value of the ν₂ band origin of ca. 1439 cm⁻¹. Rotational constants and dipole moments of the vibrational states have been determined.

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¹: Present address: Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, Ontario K1A OR6, Canada.

²: Present address: Department of Natural Philosophy, University of Strathclyde, Glasgow G4 0NG, Scotland.

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