Crystal and molecular structure of complex compound [Fe3O(CH3COO)6(H2O)3]2[ZnCl4]•2H2O

The X-ray crystal structure of trinuclear iron acetate [Fe3O(CH3COO)(6)(H2O)(3)](2)[ZnCl4]. 2H(2)O was determined. The crystal has a ionic structure. It is monoclinic, a = 25.363(7), b = 14.533(4), c = 15.692(4) Angstrom, beta = 103.11(2)degrees, space group C2/c, and R = 0.0685. The structure of the cationic complex [Fe3O(CH3COO)(6)(H2O)(3)](+) is typical of trinuclear iron(III) compounds containing a mu(3)-O bridge: the iron atoms are situated at the vertices of an almost equilateral triangle with the O atom at the center. Each Fe atom is coordinated by four O atoms of bridging carboxy groups, the mu(3)-bridging O atom, and the water molecule in the trans position to the latter O atom. Mossbauer spectroscopy evidence indicates the high-spin state (S = 5/2) of the iron(III) ions. (C) 2000 MAIK "Nauka/Interperiodica".