Crystal structure and Hirshfeld surface analysis of di-μ-chlorido-bis[(acetonitrile-κN)chlorido(ethyl 5-methyl-1H-pyrazole-3-carboxylate-κ²N²,O)copper(II)]

The title compound, [Cu₂C₁₄(C₅H₁₀N₂O₂)₂(CH₃CN)₂] or [Cu₂(μ₂-Cl)₂(CH₃—Pz-COOCH₂CH₃)₂Cl₂(CH₃CN)₂], was synthesized using a one-pot reaction of copper powder, copper(II) chloride dihydrate and ethyl 5-methyl-1H-pyrazole-3-carboxyl­ate (CH₃—Pz-COOCH₂CH₃) in aceto­nitrile under ambient conditions. This complex consists of discrete binuclear mol­ecules with a {Cu₂(μ₂-Cl)₂} core, in which the Cu...Cu distance is 3.8002 (7) Å. The pyrazole-based ligands are bidentate coordinated, leading to the formation of two five-membered chelate rings. The coordination geometry of both copper atoms (ON₂Cl₃) can be described as distorted octa­hedral on account of the aceto­nitrile coordination. A Hirshfeld surface analysis suggests that the most important contributions to the surface contacts are from H...H (40%), H...Cl/Cl...H (24.3%), H...O/O...H (11.8%), H...C/C...H (9.2%) and H...N/N...H (8.3%) inter­actions.