Diaqua-μ(3)-oxido-hexa­kis(μ(2)-trichloro­acetato-κ(2) O:O′)(trichloro­acetato-κO)trichromium(III) acetonitrile tris­olvate

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)] mol­ecule has an oxide O atom that is connected to one monodentate trichloro­acetate-coordinated and two water-coordinated Cr(III) atoms, the three metal atoms forming the points of an equilateral triangle. Each of the six remaining carboxyl­ate groups bridges a Cr–O–Cr fragment. The cluster inter­acts with the three solvent mol­ecules 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).