Anastasi, A. E., Walton, P. H., Smith, J. R. L., Sameera, W. M. C. and McGrady, J. E. (2008) On the oxidation of alkyl and aryl sulfides by [(Me(3)TACN)(MnO)-O-V(OH)(2)](+): A density functional study. Inorganica Chimica Acta, 361(4), pp. 1079-1086. (doi: 10.1016/j.ica.2007.08.009)
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Abstract
Density functional theory suggests that the formal 2-electron oxidation of sulfides, RR'S, to sulfoxides, (RR2S)-S-'=O by the model Mn-V=O catalyst, [(TACN)(MnO)-O-V(OH)(2)](+), proceeds in two quite distinct 1-electron steps. Transfer of the first electron is barrierless and generates a sulfur radical cation, antiferromagnetically coupled to a Mn-IV centre via a covalent mu-oxo bridge. The second electron-transfer step is accompanied by migration of the oxygen atom to the sulfur centre, and is rate-determining. The absence of a barrier in the first step, where a sulfur radical is formed, means that the presence of electron-donating or withdrawing substituents on the sulfide has only a minor impact on the rate of reaction. .
Item Type: | Articles |
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Keywords: | CATALYST CATION COMPLEX-CARBOXYLIC-ACID DENSITY Density functional theory ELECTRON ELECTRON-TRANSFER ELECTRONIC-STRUCTURE high-valent manganese HYDROGEN-PEROXIDE MANGANESE 1,4,7-TRIMETHYL-1,4,7-TRIAZACYCLONONANE COMPLEXES MEDIATED ALKENE EPOXIDATION MIGRATION MODEL O BOND FORMATION OXIDATION OXO(SALEN)MANGANESE(V) COMPLEXES OXOMANGANESE(V) PORPHYRIN REACTIVITY-SELECTIVITY PRINCIPLE SALEN COMPLEXES STEP SUBSTITUENTS sulfide SULFOXIDES SULFUR |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | McGrady, Prof John |
Authors: | Anastasi, A. E., Walton, P. H., Smith, J. R. L., Sameera, W. M. C., and McGrady, J. E. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Inorganica Chimica Acta |
ISSN: | 0020-1693 |
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