Acta Cryst. (2005). E61, m1834-m1836  [ doi:10.1107/S1600536805026358 ]

Poly[diaquadi-₃-malonato--pyrazine-dinickel(II)]

Y. Liu, J. Dou, D. Wang, G. Ma and D. Li

Abstract: The title compound, [Ni₂(C₃H₂O₄)₂(C₄H₄N₂)(H₂O)₂]_n, has been prepared from the hydrothermal reaction of nickel(II) chloride, malonic acid and pyrazine. The Ni^II atoms are linked via coordinated malonates, forming a two-dimensional network with cavities of 6.14 × 5.60 Å. These sheet structures are further connected into a three-dimensional network by bridging pyrazine ligands which have inversion symmetry, the mean distance between the layers being 7.39 Å. The coordination geometry around the Ni^II atom is a tetragonally elongated octahedron, with pyrazine N and aqua O atoms at the apical positions.

Online 27 August 2005

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