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Article Dans Une Revue Inorganic Chemistry Année : 2005

New Example of a Non-Heme Mononuclear Iron(IV) Oxo Complex. Spectroscopic Data and Oxidation Activity

Résumé

The green complex S = 1 [(TPEN)FeO]2+ [TPEN = N,N,N',N'-tetrakis(2-pyridylmethyl)ethane-1,2-diamine] has been obtained by treating the [(TPEN)Fe]2+ precursor with meta-chloroperoxybenzoic acid (m-CPBA). This high-valent complex belongs to the emerging family of synthetic models of FeIV=O intermediates invoked during the catalytic cycle of biological systems. This complex exhibits spectroscopic characteristics that are similar to those of other models reported recently with a similar amine/pyridine environment. Thanks to its relative stability, vibrational data in solution have been obtained by Fourier transform infrared. A comparison of the Fe=O and Fe=18O wavenumbers reveals that the Fe-oxo vibration is not a pure one. The ability of the green complex to oxidize small organic molecules has been studied. Mixtures of oxygenated products derived from two- or four-electron oxidations are obtained. The reactivity of this [FeO]2+ complex is then not straightforward, and different mechanisms may be involved.

Dates et versions

hal-00169702 , version 1 (04-09-2007)

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Marlène Martinho, Frédéric Banse, Jean-François Bartoli, Tony A. Mattioli, Pierrette Battioni, et al.. New Example of a Non-Heme Mononuclear Iron(IV) Oxo Complex. Spectroscopic Data and Oxidation Activity. Inorganic Chemistry, 2005, 44 (25), pp.9592-9596. ⟨10.1021/ic051213y⟩. ⟨hal-00169702⟩
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