Crystal structure of bis­(3-bromo­pyridine-κN)bis­(O-ethyl di­thio­carbonato-κ(2) S,S′)nickel(II)

In the title mol­ecular complex, [Ni(C(3)H(5)OS(2))(2)(C(5)H(4)BrN)(2)], the Ni(2+) cation is located on a centre of inversion and has a distorted octa­hedral N(2)S(4) environment defined by two chelating xanthate ligands and two monodentate pyridine ligands. The C—S bond lengths of the thio­carboxyl­ate group are indicative of a delocalized bond and the O—Csp (2) bond is considerably shorter than the O—Csp (3) bond, consistent with a significant contribution of one resonance form of the xanthate anion that features a formal C=O(+) unit and a negative charge on each of the S atoms. The packing of the mol­ecules is stabilized by C—H⋯S and C—H⋯π inter­actions. In addition, π–π inter­actions between the pyridine rings [centroid-to-centroid distance = 3.797 (3) Å] are also present. In the crystal structure, mol­ecules are arranged in rows along [100], forming layers parallel to (010) and (001).