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Title:INVESTIGATION OF THIOKETENE ISOMERS: MICROWAVE SPECTROSCOPY AND FORMATION CHEMISTRY OF HCCSH
Author(s):Lee, Kelvin
Contributor(s):McCarthy, Michael C.; McGuire, Brett A.; Lattanzi, Valerio; Martin-Drumel, Marie-Aline
Subject(s):Rotational structure/frequencies
Abstract:Because of their curious electronic properties, carbon-sulfide chains possess peculiar molecular structures and chemical reactivity. In this talk, we present the spectroscopic characterization of ethynethiol (\chem{HCCSH}) - an isomer of thioketene (\chem{H_2CCS}) and thiirene (c-\chem{H_2C_2S}) - and its isotopologues using Fourier-transform microwave cavity and millimeter-wave absorption spectroscopies. \chem{HCCSH} is produced in an electrical discharge of \chem{HCCH} and \chem{H_2S}. In our cavity spectrometer (10 - 40 GHz), the $J=1-0, 2-1, 3-2$ $a$-type transitions have been observed. \chem{HCC^{34}SH} was detected in natural abundance while the deuterated isotologues required \chem{HCCD} and \chem{D_2S} for \chem{DCCSH} and \chem{HCCSD} respectively. Based on \textit{ab initio} predictions, the fundamental $b$-type transitions were also measured using double resonance (150 - 300 GHz), allowing the $A$ constant to be determined approximately and guiding subsequent surveys into the millimeter-wave (280 - 655 GHz). Based on the information derived from the isotopologues, we will also discuss the molecular structure and inferred formation chemistry, in addition to its relative abundance to thioketene.
Issue Date:06/19/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100808
DOI:10.15278/isms.2018.TJ03
Other Identifier(s):TJ03
Date Available in IDEALS:2018-08-17
2018-12-12


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