Crystal structure of bis­(azido-κN)bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole-κ(2) N (2),N (3)]nickel(II)

Reaction of 2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole and sodium azide with nickel(II) triflate yielded the mononuclear title complex, [Ni(N(3))(2)(C(12)H(8)N(4)S)(2)]. The Ni(II) ion is located on a centre of symmetry and is octa­hedrally coordinated by four N atoms of the two bidentate heterocyclic ligands in the equatorial plane. The axial positions are occupied by the N atoms of two almost linear azide ions [N—N—N = 178.8 (2)°]. The thia­diazole and pyridine rings of the heterocyclic ligand are almost coplanar, with a maximum deviation from the mean plane of 0.0802 (9) Å. The cohesion of the crystal structure is ensured by π–π inter­actions between parallel pyridine rings of neighbouring mol­ecules [centroid-to-centroid distance = 3.6413 (14) Å], leading to a layered arrangement of the mol­ecules parallel to (001).