title: Reactions of the methylsulfinyl radical [CH3(O)S˙] with oxygen ((3)O2) in solid argon.
abstract: The atmospherically highly relevant methylsulfinyl radical (CH3(O)S˙) readily reacts with molecular triplet oxygen in cryogenic argon matrices containing small amounts of (3)O2. Comparison of experimental and computed IR- and UV/Vis spectra, including isotope exchange, show that the initially formed (3)O2 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.
authors.affiliation: Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany. reisenauer@org.chemie.uni-giessen.de.
authors.forename: Hans Peter
authors.initials: HP
authors.lastname: Reisenauer
authors.forename: Jarosław
authors.initials: J
authors.lastname: Romański
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Mlostoń
authors.forename: Peter R
authors.initials: PR
authors.lastname: Schreiner
mesh_terms: D001128:Argon / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D010100:Oxygen / Q000737:chemistry*; D013454:Sulfoxides / Q000737:chemistry*
chemical_list: D005609:Free Radicals; D013454:Sulfoxides; D001128:Argon; D010100:Oxygen