Abstract
The preparation, X-ray crystal structure, Mössbauer spectra and magnetic properties of a novel iron(III) oxide cluster have been reported. The reaction of excess trans-2-butenoic acid with FeSO 4·7H 2O in the presence of NaOH gives the novel hexanuclear complex [Fe 3O(O 2CCH CH–CH 3) 6(H 2O) 3][Fe 3O(O 2CCH CH–CH 3) 7(H 2O) 2](HO 2CCH CH–CH 3) 4(OH)(H 2O). The X-ray analysis reveals that it is the first case that contains two different discrete trinuclear oxo-centered [Fe 3O] units. The Mössbauer spectra of the complex are typical of high spin iron(III) complexes. The complex has been found to exhibit antiferromagnetic exchange interactions between the Fe(III) ions.
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