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.

Dibismuthates as Linking Units for Bis-Zwitterions and Coordination Polymers

“…The lion’s share of the [Bi 2 X 8 L 2 ] 2– structures has been reported with solvent molecules (e.g., L = THF, 20 , 23 − 26 H 2 O, 27 DMSO, 26 , 28 − 32 acetone 28 , 33 , 34 ) coordinating to the bismuth centers (see Figure 1 ), but in some cases more sophisticated donor molecules such as bipyridines 35 − 42 can act as Lewis bases. On the basis of our CCDC search, the most common donor atom is oxygen, 20 , 23 − 34 , 38 , 42 − 44 followed by nitrogen, 35 − 37 , 39 − 41 and to our knowledge there is only one example with sulfur (dimethyl sulfide 45 ).…”