Soume, B.B.M.D.; Yahya, R.; Gan, S.N.; Ng, S.W. (2008) Diaqua-μ(3)-oxido-hexa-kis(μ(2)-trichloro-acetato-κO:O')(trichloro-acetato-κO)trichromium(III) acetonitrile tris-olvate. Acta crystallographica. Section E, Structure reports online, 64 (Pt 9). m1175. ISSN 1600-5368
In the crystal structure of the title compound, [Cr(3)(C(2)Cl(3)O(2))(7)O(H(2)O)(2)]·3CH(3)CN, the trinuclear [Cr(3)O(H(2)O)(2)(Cl(3)CCO(2))(7)] mol-ecule has an oxide O atom that is connected to one monodentate trichloro-acetate-coordinated and two water-coordinated Cr(III) atoms, the three metal atoms forming the points of an equilateral triangle. Each of the six remaining carboxyl-ate groups bridges a Cr-O-Cr fragment. The cluster inter-acts with the three solvent mol-ecules through water-acetonitrile O-H⋯N hydrogen bonds. Adjacent clusters are linked by a water-carboxylate O-H⋯O hydrogen bond to give a helical chain. One of the CCl(3) groups was found to be disordered over two positions, with the major component having a site-occupancy factor of 0.64 (1).
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