Dialkyl, aryl-alkyl, benzylic, and benzothiophenic sulfides are selectively oxidized to sulfoxides or sulfones, with stoichiometric amounts of H2O2 (aq) or TBHP, in the presence of complexes Cp'Mo(CO)(3)Cl, CpMoO2Cl and the mesoporous material MCM-41-2 as catalysts. The use of the thianthrene 5-oxide (SSO) probe shows that CpMo(CO)(3)Cl/H2O2 or TBHP are electrophilic oxidants (Xso <= 15). The same conclusion is drawn from competition experiments with a mixture of p-ClC6H4SCH3 and C6H5SOCH3. (C) 2008 Elsevier Ltd. All rights reserved.
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Department of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,IranDepartment of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,Iran
Mehdi Bakavoli
Alireza Motavalizadeh Kakhky
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Department of Chemistry,School of Sciences,Islamic Azad University,Neyshabur Branch,Neyshabur,IranDepartment of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,Iran
Alireza Motavalizadeh Kakhky
Ali Shiri
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Department of Chemistry,School of Sciences,Ferdowsi University of Mashhad,91775-1436 Mashhad,IranDepartment of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,Iran
Ali Shiri
Mahdieh Ghabdian
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Department of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,IranDepartment of Chemistry,School of Sciences,Islamic Azad University,Mashhad Branch,Mashhad,Iran