The work in this paper presents the detail syntheses, characterization and magneto structural co-relationship of one unique novel Ni(II) octahedral complex [Ni(C₂₂H₂₆N₄O₂Cl₂)] (1), derived from azo-linked potentially tetradentate compartmental Schiff base (H₄L). The compartmental tertadentate Schiff base (H₄L) was synthesized by normal 1:2 condensation reaction between N,N’-Bis-(2-amino-ethyl)-ethane-1,2-diamine and 1-(5-chloro-2-hydroxy-phenyl)-ethanone. The new mononuclear Ni(II) complex was characterized by different microanalytical methods like elemental analyses, FT-IR, ¹H NMR, UV-Vis spectra, mass spectra & molar conductance. Molar conductance study confirmed complex (1) is non-electrolyte in nature. Inside the cavity of compartmental Schiff base (H₄L), Ni(II) metal center was connected by bridging imine nitrogen (N4 binding core) and deprotonating (phenolato oxygen), thus Schiff base(H₄L) embedded complete octahedral geometrical arrangement. Complex (1) does not exhibit any kind of hydrogen bonding and thus π→π* interactions never lead to formation of supramolecular architectures. Finally in a comparative approach magnetic moment of respective Ni(II) complex have been investigated thoroughly with theoretical some Ni(II) octahedral complexes.
Keywords: Schiff Base; H₄L Ni(II) Complex; Magnetic Moment;