Crystal structure and Hirshfeld surface analysis of di­chlorido­tetra­kis­(4-methyl-1H-pyrazole-κN2)nickel(II) aceto­nitrile disolvate

The title compound, [NiCl₂(C₄H₆N₂)₄]·2CH₃CN, is a mononuclear octa­hedral Ni^II pyrazole-based complex. Two aceto­nitrile mol­ecules are linked to the Ni^II complex by N—H⋯N hydrogen bonds. The Ni^II atom is octa­hedrally coordinated by four N atoms of four 4-methyl-1H-pyrazole ligands, forming the equatorial plane. The axial positions are occupied by two Cl atoms. [NiCl₂(C₄H₆N₂)₄]·2CH₃CN was synthesized by the reaction of 4-methyl-1H-pyrazole with nickel(II) chloride hexa­hydrate in aceto­nitrile solution under ambient conditions and characterized by single-crystal X-ray diffraction analysis. A Hirshfeld surface analysis was performed, which suggests that the most important contributions to the surface contacts are from H⋯H (62.1%), H⋯N/N⋯H (13.7%), H⋯C/C⋯H (13.4%) and H⋯Cl/Cl⋯H (10.1%) inter­actions.