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Zhang X.,Institute of Advanced Materials Research | Zhang X.,Liaocheng University | Yuan D.,Institute of Advanced Materials Research | Wei P.,Institute of Advanced Materials Research | And 2 more authors.
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

The asymmetric unit of the title compound, [Ni(C8H 7N3)3]2[SiMo12O 40]·4H2O, consists of a complex [Ni(C 8H7N3)3]2+ cation, half of a Keggin-type heteropolyanion [SiMo12O40]4- and two uncoordinated water molecules. The Ni2+ cation is surrounded in a slightly distorted octa-hedral coordination by six N atoms from three chelating 3-(2-pyrid-yl)-1H-pyrazole ligands. In the heteropolyanion, two O atoms of the central SiO4 group ( symmetry) are equally disordered about an inversion centre. N - H⋯O and O - H⋯O hydrogen bonding between the cations, anions and the uncoordinated water molecules leads to a consolidation of the structure.

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