Unexpected formation and crystal structure of tetra­kis­(1H-pyrazole-κN (2))­palladium(II) dichloride

The title salt, [Pd(C(3)H(4)N(2))(4)]Cl(2), was obtained unexpectedly by the reaction of palladium(II) dichloride with equimolar amounts of 1-chloro-1-nitro-2,2,2-tris­(pyrazol­yl)ethane in methanol solution. The Pd(2+) cation is located on an inversion centre and has a square-planar coordination sphere defined by four N atoms of four neutral pyrazole ligands. The average Pd—N distance is 2.000 (2) Å. The two chloride anions are not coordinating to Pd(2+). They are connected to the complex cations through N—H⋯Cl hydrogen bonds. In addition, C—H⋯Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.