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)]·2CHCl 3 ( 1 ) and [{Zn 2 (L)( μ ‐OMe)} 3 ]·3CHCl 3 ·MeOH ( 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 1 A and 1 B, and complex 2 consists of three closely related dinuclear units 2 A, 2 B and 2 C. 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 2 B and 2 C 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.