Hexa-μ2-acetato-κ12O:O′-μ3-oxido-tris[aquachromium(III)] nitrate acetic acid solvate

Abstract

In the crystal structure of the title salt, [Cr3(C2H3O2)6O(H2O)3]NO3·CH3CO2H, the trinuclear [Cr3(CH3CO2)6O(H2O)3] cluster cation has an oxide O atom that is connected to three water-coordinated CrIII atoms, the three metal atoms forming the points of an equilateral triangle. Each of the six acetate carboxylate groups bridges a Cr–O–Cr fragment. The cluster cation interacts with the nitrate counter-ion and solvent molecules through O—H...O hydrogen bonds, forming a three-dimensional hydrogen-bonded network.