Acta Cryst. (2006). E62, m1400-m1402  [ doi:10.1107/S1600536806018344 ]

Potassium trans-diaquabis[oxalato(2-)-²O,O']chromate(III)

M. M. Bélombé, J. Nenwa, B. P. Fokwa and R. Dronskowski

Abstract: The title compound, K[Cr(C₂O₄)₂(H₂O)₂], was crystallized from an aqueous solution. It is the first member without uncoordinated water molecules of formula A_m[M(C₂O₄)₂(H₂O)₂]·xH₂O, where A = monovalent cation, m = 1 or 2, M = metal(II) or metal(III), x 0. The crystal packing is governed by electrostatic and coordinative interactions, and intermolecular hydrogen bonds help to stabilize the packing. The coordination of the Cr sites is quasi-octahedral, and the K ions are eight-coordinated by O atoms of oxalate ligands, forming strongly distorted square antiprisms.

Online 26 May 2006

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