Reactions of the methylsulfinyl radical [CH3(O)S˙] with oxygen (3O2) in solid argon

Hans Peter Reisenauer; Jarosław Romański; Grzegorz Mlostoń; Peter R. Schreiner

doi:10.1039/C5CC02168E

Reactions of the methylsulfinyl radical [CH₃(O)S˙] with oxygen (³O₂) in solid argon†

Hans Peter Reisenauer,*^a Jarosław Romański,^b Grzegorz Mlostoń*^b and Peter R. Schreiner

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^a Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
E-mail: reisenauer@org.chemie.uni-giessen.de
Fax: +49 641-9934309
Tel: +49 641-9934380

^b Department of Organic and Applied Chemistry, University of Lodz, Tamka 12, 91-493 Lodz, Poland
E-mail: gmloston@uni.lodz.pl
Fax: +48 42 6655162
Tel: +48 42 6355761

Abstract

The atmospherically highly relevant methylsulfinyl radical (CH₃(O)S˙) readily reacts with molecular triplet oxygen in cryogenic argon matrices containing small amounts of ³O₂. Comparison of experimental and computed IR- and UV/Vis spectra, including isotope exchange, show that the initially formed ³O₂ adduct has the structure of a peroxyl radical (CH₃(O)SOO˙), which upon irradiation with UV light isomerizes to the methylsulfonoxyl radical (CH₃SO₃˙). The latter transforms into the methansulfonic acid radical (˙CH₂SO₃H) by irradiation with visible light. During the matrix photolysis small amounts of SO₃ and the methyl radical were detected indicating competitive direct photodissociation.

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DOI: https://doi.org/10.1039/C5CC02168E
Article type: Communication
Submitted: 13 Mar 2015
Accepted: 18 May 2015
First published: 18 May 2015
This article is Open Access

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Chem. Commun., 2015,51, 10022-10025

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Reactions of the methylsulfinyl radical [CH₃(O)S˙] with oxygen (³O₂) in solid argon

H. P. Reisenauer, J. Romański, G. Mlostoń and P. R. Schreiner, Chem. Commun., 2015, 51, 10022 DOI: 10.1039/C5CC02168E

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Chemical Communications