Crystal structure of bis­1-(naphthalen-1-ylmeth­yl)pyridinium bis­(22-di­cyano­ethene-11-di­thiol­ato-κ2SS′)nickelate(II)

摘要

A new ion-pair complex, (C16H14N)2[Ni(C4N2S2)2] or (1-NaMePy)2[Ni(imnt)2], where 1-NaMePy is 1-(4-naphthyl­methyl­ene)pyridinium and imnt is 2,2-di­cyano­ethene-1,1-di­thiol­ate, was obtained by the direct reaction of NiCl2, K2imnt and (1-NaMePy)⁺Br⁻ in H2O. The asymmetric unit contains a [1-NaMePy]⁺ cation and one half of an Ni(imnt)2 ²⁻ anion. The Ni^II ion lies on an inversion centre and adopts a square-planar configuration with Ni—S bond lengths of 2.200 (1) and 2.216 (1) Å. In the [1-NaMePy]⁺ cation, the naphthyl ringsystem and the pyridinium ring make a dihedral angle of 90.0 (2)°. In the crystal, C—H⋯N and C—H⋯Ni hydrogen bonds, as well as π–π inter­actions between the chelate ring and the pyridinium ring [centroid–centroid distance = 3.675 (2) Å] link the ions into a three-dimensional network.