Copper(II) Coordination Complex Constructed from Halogenated Tetradentate Schiff Base Ligand: Synthesis, Crystal Structure, and Hirshfeld Surface Analysis

Abstract

Copper complex [Cu-3Br-salen]] (3-Br-salen = N,N'-bis(3-bromosalicylidene)ethylene-1,2-diamine) is synthesized as a part of the research work of exploring the relationship between the constitution of Schiff-base ligands and the complex structures. The single-crystal X-ray diffraction analysis indicates that the title compound crystallizes in the monoclinic system, sp. gr. Pbca, Z = 8. IntermolecIular hydrogen bonds and the π···π stacking interactions form 2D networks between which there is only van der Waals interaction. Besides, Hirshfeld surface analysis was used to further study the intermolecular interactions of the complexes.