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Photochemistry of XCH2CN (X = -Cl, -SH) in Argon Matrices

Abstract : We report infrared spectra and photochemical behavior of the potentially astrochemically significant species, mercaptoacetonitrile (HS-CHC≡N) and, for comparison purposes, chloroacetonitrile (Cl-CHC≡N), both suspended in an argon matrix at 6 K. Photolytic formation of the isocyano products HS-CH-NC and Cl-CH-NC were observed as well as CHNSC and CHSCN (in HS-CHCN photolysis). While no dissociation products were observed for Cl-CH-CN, photolysis of HS-CH-CN produced compounds necessitating the loss of the CN group to form CH═S, the SH group to form HC-CN and HC-CN, or both CN and SH to form CH and CH. Observation of emission spectra upon annealing indicates the presence of free sulfur atom in matrices of photolyzed HS-CH-CN.
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Submitted on : Friday, June 21, 2019 - 3:49:09 PM
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Zapala et al-2019-Photochemist...
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Joanna Zapala, Thomas Custer, Jean-Claude Guillemin, Marcin Gronowski. Photochemistry of XCH2CN (X = -Cl, -SH) in Argon Matrices. Journal of Physical Chemistry A, 2019, 123 (17), pp.3818-3830. ⟨10.1021/acs.jpca.9b01983⟩. ⟨hal-02149782⟩



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