Trinuclear and tetranuclear adduct formation between sodium perchlorate and copper(II) complexes of salicylaldimine type ligands: Structural characterization and theoretical investigation

► Adduct formation between sodium perchlorate and copper(II) complexes of salicylaldimine type ligands. ► DFT theoretical study to compute and compare the formation energies of the adducts. ► Characterization of C-H···O H-bonds and Cu2+-π non-covalent interactions from X-ray structures and computation of their energies.