Newly synthesized homomultinuclear Co (II) and Cu (II) bissalamo‐like complexes: Structural characterizations, Hirshfeld analyses, fluorescence and antibacterial properties

Abstract

Rare homodinuclear Co (II) complex [Co2(L)NO3] (1) and helical centrosymmetric homotetranuclear Cu (II) complex [Cu4(L)2(H2O)2]·2ClO4 (2), have been synthesized by a newly explored bis (salamo)‐like tetraoxime ligand (H3L) with Co (NO3)2·6H2O and Cu (ClO4)2·6H2O, respectively, and characterized by elemental analyses, IR, UV–Vis spectroscopy and single crystal X‐ray crystallography. X‐ray crystallographic studies indicate that the two Co (II) atoms (Co1 and Co2) in complex 1 have different N2O4 and N2O3 coordination spheres, and distorted octahedral (Co1) and slightly distorted triangular bipyramidal (Co2) geometries, while Cu (II) atoms in complex 2 have also two different N2O4 (Cu1) and N2O3 (Cu2) coordination environments, and complex 2 forms a helical centrosymmetric molecule. In addition, supramolecular interactions, Hirshfeld surfaces analyses, antibacterial and fluorescence properties were also investigated in detail.