Bennur, T. H. ; Sabne, S. ; Deshpande, S. S. ; Srinivas, D. ; Sivasanker, S. (2002) Benzylic oxidation with HO catalyzed by Mn complexes of N,N',N"-trimethyl-1,4,7-triazacyclononane: spectroscopic investigations of the active Mn species Journal of Molecular Catalysis A: Chemical, 185 (1-2). pp. 71-80. ISSN 1381-1169
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S1381-1169(02)00132-2
Abstract
Mn complexes of N,N',N"-trimethyl-1,4,7-triazacyclononane (Mn–tmtacn) exhibit good catalytic activity, at ambient temperatures, for the benzylic oxidation of aromatics selectively to the corresponding alcohol and carbonyl compounds with H2O2 as oxidant in the presence of carboxylate buffers. The active Mn species in the reaction medium was investigated by UV-visible (UV-Vis), FT-IR–attenuated total reflectance (FT-IR-ATR) and electron spin resonance (ESR) spectroscopic techniques. The studies revealed the formation of terminal oxo- and μ-oxo-Mn(IV)-tmtacn complexes during the reaction. The oxo-manganese complexes and the nature of the carboxylic acid play an important role in the activation of the benzylic C-H bond.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Manganese Complexes; Mn-tmtacn; Selective Oxidation; Benzylic Oxidation; Oxidation with H2O2; ESR; Spectroscopic Investigations |
| ID Code: | 47710 |
| Deposited On: | 12 Jul 2011 14:40 |
| Last Modified: | 12 Jul 2011 14:40 |
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