Syntheses, crystal structures and spectroscopic characterization of two new octahedral nickel(II) complexes of a Schiff base ligand derived from pyridoxal and 2-(pyrid-2-yl)ethylamine

Abstract Two new coordination compounds based on ONN donor Schiff base ligand derived from pyridoxal and 2-(pyrid-2-yl)ethylamine, namely {[Ni(HL)(H 2 O) 2 ](ClO 4 ) 2 } ∞ ( 1 ) and [Ni(HL)(H 2 O)(SCN) 2 ] ( 2 ) have been synthesized and structurally characterized by single-crystal X-ray diffraction along with other physical techniques, including elemental analysis, IR spectra and UV–Vis studies. X-ray studies suggest that both 1 and 2 are mononuclear nickel(II) complexes and exhibit distorted octahedral geometry. In these compounds the pyridoxal based Schiff base ligand displays different coordination modes constructing various architectures.