Synthesis, crystal structure and Hirshfeld surface analysis of di-l2-iodido-bis[(2,20-biquinolinej2N,N0)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 2,20-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%). © 2023 International Union of Crystallography. All rights reserved.