An investigation of structure, Hirshfeld surface, and fluorescence properties of two dinuclear Ni (II) and Zn (II) salamo‐type complexes

Abstract

Two dinuclear Ni (II) and Zn (II) salamo-type complexes, [Ni 2 (L)(μ-OAc) (MeOH)]Á2CHCl 3 (1) and [{Zn 2 (L)(μ-OMe)} 3 ]Á3CHCl 3 ÁMeOH (2), have been successfully synthesized by wet-chemical method and characterized by elemental analyses, IR spectra, UV-Vis spectra and single crystal X-ray diffraction. Complex 1 consists of two closely related dinuclear units 1A and 1B, and complex 2 consists of three closely related dinuclear units 2A, 2B and 2C. The five units are unique example of crystallographically independent but chemically identical molecules. The Ni (II) atoms of complex 1 are located in the N 2 O 4 coordination cavities, possessing six-coordinated distorted octahedral geometries, but all Zn (II) atoms in complex 2 are located in the N 2 O 3 coordination cavities, possessing five-coordinated distorted square-pyramid and triangular bipyramid geometries, the geometries about the Zn (II) atoms (Zn3 and Zn6) that obtain in 2B and 2C where τ 5 is very close to 0.500, which is τ 5Zn3 = 0.5006 and τ 5Zn6 = 0.4941, respectively. The interactions were quantitatively determined by Hirshfeld surfaces analyses. Significantly, fluorescence properties were also investigated.