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

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(μ-C1)2 plane. The salt forms a three-dimensional network arising from hydrogen bonds between cations, anions and water molecules.