Acta Cryst. (2009). E65, m1540-m1541  [ doi:10.1107/S1600536809046170 ]

Tetraguanidinium bis[citrato(3-)]cuprate(II) dihydrate

M. T. M. Al-Dajani, H. H. Abdallah, N. Mohamed, C. S. Yeap and H.-K. Fun

Abstract: The asymmetric unit of the title compound, (CH₆N₃)₄[Cu(C₆H₅O₇)₂]·2H₂O, contains one-half of a centrosymmetric Cu^II complex anion, two guanidinium cations and a water molecule. The Cu^II ion, lying on a crystallographic inversion center, is hexacoordinated with two citrate anions in a distorted octahedral geometry. An intramolecular O-HO hydrogen bond generates an S(6) ring motif. In the crystal structure, molecules are linked into a three-dimensional framework by intermolecular N-HO and O-HO hydrogen bonds.

Online 7 November 2009

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