Synthesis, X-ray structure and DFT calculation of magnetic properties of binuclear Ni(II) complex with tridentate hydrazone-based ligand

Binuclear double end-on azido bridged Ni(II) complex ( 1 ) with composition [Ni 2 L 2 ( μ - 1,1 -N 3 ) 2 (N 3 ) 2 ]×6H 2 O,  ( L = ( E )- N , N , N -trimethyl-2-oxo-2-(2- -(1-(pyridin-2-yl)ethylidene)hydrazinyl)ethan-1-amin) was synthesized and cha­racterized by single-crystal X-ray diffraction method. Ni(II) ions are hexaco­or­dinated with the tridentate heteroaromatic hydrazone-based ligand and three azido ligands (one terminal and two are end-on bridges). DFT calculations revealed that coupling between two Ni(II) centers is ferromagnetic in agreement with binuclear Ni(II) complexes with similar structures.