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Activation of Dioxygen by a Mononuclear Non-Heme Iron Complex: Characterization of a Fe(III)(OOH) Intermediate

Activation of Dioxygen by a Mononuclear Non-Heme Iron Complex: Characterization of a Fe(III)(OOH) Intermediate

Marlène Martinho, Guillaume Blain, Frédéric Banse

Dalton Trans. 2010 Feb 14;39(6):1630-4.

PMID: 20104327

Abstract:

The reaction of the iron(ii) complex supported by the ligand L(5)(2)aH (2,2-dimethyl-N-[6-({[2-(methyl-pyridin-2-ylmethyl-amino)-ethyl]-pyridin-2-ylmethyl-amino}-methyl)-pyridin-2-yl]-propionamide) with dioxygen, in the presence of HClO(4) and NaBPh(4) yields the corresponding low spin (S = 1/2) Fe(III)(OOH) complex. This reaction, where the anion BPh(4)(-) acts as an electron donor, is reminiscent of the reductive activation of O(2) by enzymatic systems. Under these specific experimental conditions, the hydroperoxoiron(iii) complex evolves in an unexpected way to yield a high spin (S = 5/2) green species. This transformation is shown to arise from the reaction between the hydroperoxoiron(iii) intermediate and BPh(3), a side product of BPh(4)(-).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP470463435	2,2-Dimethyl-N-(5-trimethylsilanylethynyl-pyridin-2-yl)-propionamide		470463-43-5	Price

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