Bennur, T. H. ; Srinivas, D. ; Sivasanker, S. ; Puranik, V. G. (2004) Catalytic activities of oxo-Mn-triazacyclononane complexes: spectral studies and single crystal X-ray structure of [Mn4O6(1,4,7-triazacyclononane)4](ClO4)4·H2O Journal of Molecular Catalysis A: Chemical, 219 (2). pp. 209-216. 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/j.molcata.2004.05.024
Abstract
Monomeric terminal-oxo- and tetrameric bridged-oxo–Mn complexes viz., [(tmtacn)Mn(O)(H2O)]SO4, and [Mn4O6(tacn)4](ClO4)4·H2O, respectively, were isolated and characterized by FT-IR, UV–vis, EPR and magnetic susceptibility. Here, TMTACN = N,N',N"-trimethyl-1,4,7-triazacyclononane and TACN = 1,4,7-triazacyclononane. Single crystal X-ray structure of the tetrameric bridged-oxo-Mn complex is reported. The catalytic oxidation activities of these complexes for benzylic C---H bond oxidation of ethylbenzene with aqueous H2O2 and tert-butyl hydroperoxide (TBHP) are reported. The studies reveal that nuclearity and type of oxo–Mn speciation influence the catalytic activity. While the monomeric terminal-oxo-Mn complex exhibits efficient C---H bond oxidation activity, the tetrameric bridged-oxo-Mn complex shows the catalase activity.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Oxo-Mn Complexes; Triazacyclononane Complexes of Mn; Oxidation of Ethylbenzene; Peroxidases; Catalase Activity; X-ray Structure; Spectroscopic Characterization |
| ID Code: | 47688 |
| Deposited On: | 12 Jul 2011 14:45 |
| Last Modified: | 12 Jul 2011 14:45 |
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