Investigation of thioketene isomers: Microwave spectroscopy and formation chemistry of HCCSH

Lee, Kelvin

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https://hdl.handle.net/2142/100808 Copy

Description

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

Issue Date

2018-06-19

Keyword(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 (HCCSH) - an isomer of thioketene (H2CCS) and thiirene (c-H2C2S) - and its isotopologues using Fourier-transform microwave cavity and millimeter-wave absorption spectroscopies. HCCSH is produced in an electrical discharge of HCCH and H2S. In our cavity spectrometer (10 - 40 GHz), the J = 1 − 0, 2 − 1, 3 − 2 a-type transitions have been observed. HCC34SH was detected in natural abundance while the deuterated isotologues required HCCD and D2S for DCCSH and HCCSD respectively. Based on 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.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100808

DOI

10.15278/isms.2018.TJ03

Copyright and License Information

Copyright 2018 Kelvin Lee

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