A mononuclear NiL complex was synthesized using bis-N,N'-salicylidene-1,3-propanediamine and nickel(II) salts, then reacted with ZnBr2 and co-ligands like pyrazole and 3,5-lutidine to create diheteronuclear complexes.
The characterization of the complexes involved techniques such as elemental analysis, thermogravimetry (TG), infrared (IR) spectroscopy, and mass spectrometry.
Theoretical analyses using Gaussian09 assessed formation enthalpies, dipole moments, and electronic structure, revealing that lutidine, as a stronger coligand, induces a square pyramidal structure in the NiL complex.