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  • Title: Hexakis[3-(aminocarbonyl)pyridinium] decavanadate(V) dihydrate.
    Author: Pacigová S, Rakovský E, Sivák M, Zák Z.
    Journal: Acta Crystallogr C; 2007 Sep; 63(Pt 9):m419-22. PubMed ID: 17762113.
    Abstract:
    The structure of the title compound, (C(6)H(7)N(2)O)(6)[V(10)O(28)].2H2O, at 120 (2) K has monoclinic (C2/c) symmetry. The asymmetric unit consists of one half-decavanadate anion of Ci symmetry, three cations and one water molecule. Each water molecule is hydrogen bonded to two decavanadate anions, thus forming a one-dimensional chain of anions. The three-dimensional supramolecular structure is formed by a network of N-H...O, O-H...O and C-H...O hydrogen bonds, in which the cations, anions and water molecules are involved, and by nonparallel-displaced pi-stacking interactions between pyridine rings. As a result of hydrogen bonding, the carboxamide groups of the cations are somewhat twisted from the pyridine ring plane.
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