Acta Cryst. (2007). E63, m2030  [ doi:10.1107/S1600536807031157 ]

Bis[4-(dimethylamino)pyridinium] bis(1,2-dicyanoethylene-1,2-dithiolato-²S,S')nickelate(II)

J.-R. Zhou, Y. Hou and C.-L. Ni

Abstract: The asymmetric unit of the title ion-pair complex, (C₇H₁₁N₂)₂[Ni(C₄N₂S₂)₂] or (DMAPH)₂[Ni(mnt)₂] [where DMAPH is 4-(dimethylamino)pyridinium and mnt is maleonitriledithiolate], consists of one cation and one half-anion, the Ni^II atom lying on a crystallographic centre of symmetry. The metal is coordinated by four S atoms of two mnt^2- ligands in a square-planar geometry. The [Ni(mnt)₂]^2- anions (A) and DMAPH⁺ cations (C) are stacked in an ACCA arrangement to form one-dimensional columns along the a axis, with a centroid-centroid separation between the pyridine rings of 4.032 (4) Å. The columns are linked by intermolecular N-HN hydrogen bonds, resulting in a two-dimensional network.

Online 5 July 2007

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