Acta Cryst. (2006). E62, m538-m541  [ doi:10.1107/S1600536806004399 ]

Bis(ethylenediammonium) diaquabis[hydrogendiphosphato(3-)]nickelate(II): structure and vibrational spectroscopy

R. Essehli, B. El Bali, M. Lachkar, I. Svoboda and H. Fuess

Abstract: In the crystal structure of the title compound, (C₂N₂H₁₀)₂[Ni(HP₂O₇)₂(H₂O)₂], each Ni cation is surrounded by two symmetry-related diphosphate anions and two symmetry-related water molecules within a distorted octahedron. The octahedra are connected via O-HO hydrogen bonding into layers. The ethylenediammonium cations are located in the interlayer space and are connected by N-HO hydrogen bonds to the anionic layers. The Ni cation and the two crystallographically independent ethylenediammonium cations are located on centres of inversion, whereas the diphosphate anion and the water molecule are located in general positions.

Online 17 February 2006

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