Bis(methanol-1κO)tetra-μ-pyridazine-1:2κ(4)N:N';2:3κ(4)N:N'-di-μ-thio-cyanato-1:2κ(2)N:N;2:3κ(2)N:N-tetrathio-cyanato-1κ(2)N,3κ(2)N-trinickel(II) methanol tetra-solvate.

Reaction of an excess nickel(II) thio-cyanate with pyridazine leads to single crystals of the title compound, [Ni(3)(NCS)(6)(N(2)C(4)H(4))(4)(CH(3)OH)(2)]·4CH(3)OH. The crystal structure consists of trimeric discrete complexes, in which two Ni(II) cations are coordinated by two terminal and one μ-1,1 bridging thio-cyanato anions, one methanol mol-ecule and two bridging pyridazine ligands, whereas the central Ni(II) atom is coordinated by two μ-1,1 bridging anions as well as four bridging pyridazine ligands. The asymmetric unit consists of two crystallographically independent Ni cations, one of which is located on a center of inversion, as well as three crystallographically independent thio-cyanato anions, two pyridazine ligands and three independent methanol mol-ecules in general positions. Two of the solvent mol-ecules do not coordinate to the metal atoms and are located in cavities of the structure. The discrete complexes are linked by inter-molecular O-H⋯O and O-H⋯S hydrogen bonding into layers parallel to the bc plane.