Hydrogen-bonding and π–π stacking inter­actions in tris­(1,10-phenanthroline-κ(2) N,N′)nickel(II) bis­{[1-tert-butyl­imidazole-2(3H)-thione-κS]trichloridonickelate(II)} acetonitrile disolvate

The asymmetric unit of the title complex, [Ni(C(12)H(8)N(2))(3)][NiCl(3)(C(7)H(12)N(2)S)](2)·2CH(3)CN, consists of one anion, one-half of a cation and one acetonitrile mol­ecule. The Ni(II) atom in the [Ni(phen)(3)](2+) cation (phen is 1,10-phenanthroline) lies on an inversion centre in an octa­hedral environment, whereas in the [NiCl(3)(tm)](−) anion [tm is 1-tert-butyl­imidazole-2(3H)-thione], the geometry is distorted tetra­hedral. In the crystal structure, inter­molecular C—H⋯Cl hydrogen bonds and π–π stacking inter­actions (centroid–centroid distance = 3.52 Å) lead to the formation of a three-dimensional framework. One of the methyl groups of the tert-butyl group of N-tert-butyl-2-thio­imidazole is disordered between two equally populated positions.