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The novel oxo-centered dinuclear iron complex K4[Fe2O(IDA)4] (1) (IDA = iminodiacetate) was synthesized by the air-oxidation of ferrous iron in an aqueous solution in the presence of iminodiacetate and characterized by IR, magnetic susceptibility, and X-ray crystallography methods. The structure contains dimeric units where the two crystallographically equivalent iron centers are linked by a μ2-oxo bridge at a symmetric center of crystallography, forming a stick-like core, [Fe2O]4+, and have distorted octahedral environments each with one tridentate and one “bidentate-like” IDA ligands completing the coordination sphere. The iron centers are antiferromagnetically coupled in the cluster since they are bridged by the μ2-oxo oxygen atom in the center of symmetry and this was confirmed by the magnetic susceptibility study. |
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