Acta Cryst. (2002). E58, m653-m655  [ doi:10.1107/S1600536802018895 ]

Poly[[diaqua(₄-squarato-O,O',O'',O''')nickel(II)] 0.71-hydrate]

J. Greve and C. Näther

Abstract: In the title compound, {[Ni(C₄O₄)(H₂O)₂]·0.71H₂O}_n, each Ni atom is coordinated by four squarate dianions and two water molecules within a slightly distorted octahedron. The water molecules occupy general positions and the Ni atom, as well as the two crystallographically independent squarate dianions, are located in special positions. Hydrogen bonding is found between the O atoms of the squarate dianions and the water molecules. In the crystal structure, voids are found that are filled with disordered clathrate water molecules. The compound is isotypic with the previously reported Mn, Fe and Co compounds.

Online 18 October 2002

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