Synthesis, crystal structure and Hirshfeld surface analysis of di-μ2-iodido-bis[(2,2′-biquinoline-κ2N,N′)copper(I)]

The molecular and crystal structures of the title compound, [Cu2I2(C18H12N2)2], were examined by single-crystal X-ray diffraction and Hirshfeld surface analysis. The Cu atom is coordinated in a distorted tetrahedral geometry by two N atoms from the 2,2′-biquinoline ligands and the two μ2-bridging iodide ligands. The molecules are in contact via π–π-stacking interactions. Hirshfeld surface analysis showed that the most important contributions to the intermolecular interactions 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%).