Synthesis, crystal structure and Hirshfeld surface analysis of di-μ 2 -iodido-bis-[(2,2'-bi-quinoline-κ 2 N , N ')copper(I)].

The mol-ecular and crystal structures of the title compound, [Cu 2 I 2 (C 18 H 12 N 2 ) 2 ], were examined by single-crystal X-ray diffraction and Hirshfeld surface analysis. The Cu atom is coordinated in a distorted tetra-hedral geometry by two N atoms from the 2,2'-bi-quinoline ligands and the two μ 2 -bridging iodide ligands. The mol-ecules are in contact via π-π-stacking inter-actions. Hirshfeld surface analysis showed that the most important contributions to the inter-molecular inter-actions are H⋯H (39.7%), H⋯I/I⋯H (17.8%), C⋯H/H⋯C (17.5%), C⋯C (16.5%), N⋯C/C⋯N (3.9%) and N⋯H/H⋯N (3.5%).