Synthesis and spectroscopic characterization of transition metal(II) complexes with a novel N2O2 donor ligand

A novel tetradentate Schiff base ligand, 2,2′-{1,2-phenylene-bis[(E)-methylidienenitrilo]} dipyridine-3-ol, has been synthesized by the condensation of phthalaldehyde with 2-amino-3-hydroxypyridine. A series of its complexes with transition metals have been prepared and characterized by a combination of IR, UV-VIS, and LC-MS spectroscopy, magnetic measurements, and elemental analyses. The spectral data of the ligand and its complexes are discussed in connection with structural changes that occur due to complexation. The text was submitted by the authors in English.