Microwave characterization of thiobenzaldehyde and other products in the discharge of benzene with sulfur additives
McCarthy, Michael C.
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https://hdl.handle.net/2142/107408
Description
Title
Microwave characterization of thiobenzaldehyde and other products in the discharge of benzene with sulfur additives
Author(s)
McCarthy, Michael C.
Contributor(s)
Puzzarini, Cristina
Carroll, Brandon
Lee, Kelvin
Porterfield, Jessie P.
Dell'isola, Valentina
Issue Date
2020-06-25
Keyword(s)
Spectroscopy as an analytical tool
Abstract
Although many organo-sulfur species have been detected in molecular clouds and star-forming regions, they are insufficient to account for the expected sulfur content. In an attempt to identify new potential sulfur reservoirs, we have studied the discharge of benzene with both \chem{H_2S} and \chem{CS_2}. Thiobenzaldehyde is the first species we have characterized at high resolution using chirped pulse and cavity enhanced microwave spectroscopy in the 2-40\,GHz region. Production of thiobenzaldehyde was particularly prominent in the discharge of benzene with carbon disulfide. Isotopic substitution with $^{13}$\chem{CS_2} indicates a relatively simple formation pathway for thiobenzaldehyde, initiated by attack of the benzene ring by $^{13}$CS followed by an H-atom shift from the benzene ring. Although much weaker, observation of thiobenzaldehyde in the discharge of benzene with \chem{H_2S} suggests that other pathways may be relevant.
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