Crystal and molecular structure of a new µ-oxo-bridged iron(III) dimer formed with the nitrilotriacetate ligand

Abstract

The molecular structure of the oxo-bridged dimer barium µ-oxo-bis{aqua[nitrilo-κN-triacetato(3–)-κ³O,O′,O″]ferrate(1–)}–water(1/4), Ba[{Fe(nta)(H₂O)}₂O]·4H₂O, which has an Fe–O–Fe angle of 153.2(6)° has been determined by X-ray crystallography. The iron ions are six-co-ordinate with one tetradentate nta ligand and one water molecule completing the co-ordination sphere. The relationship of this compound to other iron–nta complexes is discussed in the context of the hydrolysis reactions of iron(III) in aqueous solutions.