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DOI: 10.1039/A608298J (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 2109-2112

Towards a model for the oxidized form of purple acid phosphatase: crystal structure and magnetic properties of a binuclear iron(III) complex containing phosphate ligands[hair space]

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Lihua Yin, Peng Cheng, Xinkan Yao and Honggen Wang

Abstract

A novel binuclear iron(III) complex [{FeL[O2P(OPh)2]}2][ClO 4]2 was synthesized and characterized by X-ray single-crystal structure analysis, where HL is bis(benzimidazol-2-ylmethyl)(2-hydroxyethyl)amine. The crystals are triclinic, space group P[1 with combining macron], with a = 11.523(9), b = 11.809(6), c = 13.406(4) Å, α = 68.52(4), β = 71.41(5), γ = 71.85(6)° and Z = 1. The structure shows that the iron(III) ions are bridged by the oxygen atoms of two L ligands and a phosphate ligand is terminally co-ordinated to each iron(III). Magnetic susceptibility measurements in the range 4.2–300 K and subsequent calculations based on an isotropic Heisenberg model suggest antiferromagnetic coupling between the iron(III) ions with J = -17.5 cm-1.

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