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• W1987136109 abstract "The composition of a (μ-oxo)diiron(III) complex coordinated by tris[(3,5-dimethyl-4-methoxy)pyridyl-2-methyl]amine (R3TPA) ligands was investigated. Characterization using a variety of spectroscopic methods and X-ray crystallography indicated that the reaction of iron(III) perchlorate, sodium hydroxide, and R3TPA affords [Fe2(μ-O)(μ-OH)(R3TPA)2](ClO4)3 (2) rather than the previously reported species [Fe2(μ-O)(OH)(H2O)(R3TPA)2](ClO4)3 (1). Facile conversion of the (μ-oxo)(μ-hydroxo)diiron(III) core of 2 to the (μ-oxo)(hydroxo)(aqua)diiron(III) core of 1 occurs in the presence of water and at low temperature. When 2 is exposed to wet acetonitrile at room temperature, the CH3CN adduct is hydrolyzed to CH3COO–, which forms the compound [Fe2(μ-O)(μ-CH3COO)(R3TPA)2](ClO4)3 (10). The identity of 10 was confirmed by comparison of its spectroscopic properties with those of an independently prepared sample. To evaluate whether or not 1 and 2 are capable of generating the diiron(IV) species [Fe2(μ-O)(OH)(O)(R3TPA)2]3+ (4), which has previously been generated as a synthetic model for high-valent diiron protein oxygenated intermediates, studies were performed to investigate their reactivity with hydrogen peroxide. Because 2 reacts rapidly with hydrogen peroxide in CH3CN but not in CH3CN/H2O, conditions that favor conversion to 1, complex 1 is not a likely precursor to 4. Compound 4 also forms in the reaction of 2 with H2O2 in solvents lacking a nitrile, suggesting that hydrolysis of CH3CN is not involved in the H2O2 activation reaction. These findings shed light on the formation of several diiron complexes of electron-rich R3TPA ligands and elaborate on conditions required to generate synthetic models of diiron(IV) protein intermediates with this ligand framework." @default.
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• W1987136109 date "2012-01-20" @default.
• W1987136109 modified "2023-10-03" @default.
• W1987136109 title "Evaluating the Identity and Diiron Core Transformations of a (μ-Oxo)diiron(III) Complex Supported by Electron-Rich Tris(pyridyl-2-methyl)amine Ligands" @default.
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• W1987136109 doi "https://doi.org/10.1021/ic202379b" @default.
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