Nickel(II) complexes of the unsymmetrical tetradentate Schiff base of methyl-2-(N-2′-aminoethane), (1-methyl-2′-aminoethane), (3-aminopropylamino)cyclopentenedithiocarboxylate: Synthesis, characterization, thermodynamic and computational studies

Five new unsymmetrical Schiff bases containing NNOS coordination sphere and their Ni(II) complexes were synthesized and characterized. The formation constants were measured using UV-Vis spectrophotometry titration for 1:1 complex formation. Also, the gaussian03 program package was used for calculating of structural, electronic and orbital's properties of the complexes.