Bis[1-(4-bromobenzyl)-3-methylpyrazinium] bis(1,2-dicyanoethene-1,2-dithiolato-κ3 S,S′)nickelate(II)

Abstract

The title compound, (C12H12BrN2)[Ni(C4N2S2)2], is an ion-pair complex, isostructural with the Cl-containing analogue. The anion lies on an inversion centre and the NiII ion is coordinated by four S atoms, giving the expected square-planar coordination geometry. The cation adopts a conformation where the benzene and pyrazine rings are twisted with respect to the plane of the central C—C—N chain which links them. C—H...S and π–π interactions between cations and anions are observed in the crystal structure, and C—H...π interactions mediate the formation of ribbons of cations.