Acta Cryst. (2008). E64, m643-m644  [ doi:10.1107/S1600536808009367 ]

Bis(5-amino-4-aminocarbonyl-1H-imidazol-3-ium) (5-amino-4-aminocarbonyl-1H-imidazol-3-ium-O)-di--chlorido-heptachlorido-dibismuth(III) monohydrate

L.-P. Lv, L.-J. He, W.-W. Li, W.-B. Yu and X.-C. Hu

Abstract: The title compound, (C₄H₇N₄O)₂[Bi₂Cl₉(C₄H₇N₄O)]·H₂O, was prepared by the reaction of bismuth trichloride and 5-amino-1H-imidazole-4-carboxamide in a dilute HCl medium. The asymmetric unit contains two 5-amino-4-aminocarbonyl-1H-imidazol-3-ium cations, one edge-shared non-centrosymmetric bioctahedral [Bi₂C1₉(C₄H₇N₄O)]^2- dianion and a water molecule. In the dianion, the planar 5-amino-4-aminocarbonyl-1H-imidazol-3-ium ligand occupies an equatorial site and is inclined at an angle of 75.7 (2)° to the Bi₂(-C1)₂ plane. The salt forms a three-dimensional network arising from hydrogen bonds between cations, anions and water molecules.

Online 10 April 2008

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