Vinyl mercaptan (ethenethiol, CH$_2$$=$CHSH) exists in the gas phase in two distinct rotameric forms, \textit{syn} (planar) and \textit{anti} (quasi-planar in the ground vibrational state). The microwave spectra of these two isomers were investigated previously\footnote{M. Tanimoto et al. \textit{J. Mol. Spectrosc.} 78, 95--105 \& 106--119 (1979)} however not exceeding frequencies of about 65 GHz.
In the present investigation, the
pure rotational spectra of both species have been investigated at millimeter wavelengths. Vinyl mercaptan was produced in a radiofrequency discharge through a constant flow of ethanedithiol at low pressure. Both \textit{syn} and \textit{anti} rotamers were observed
and new extensive sets of molecular parameters were obtained.
Owing to its close structural relationship to vinyl alcohol and the astronomical
abundance of complex sulfur-bearing molecules, vinyl mercaptan is a plausible
candidate for future radio astronomical searches.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/50962
DOI
https://doi.org/10.15278/isms.2014.MG15
Copyright and License Information
Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/
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MG15_Abstract.pdf
MG15_Abstract.txt
MG15_Presentation.pdf