Synthesis, Structure, and Spectral Properties of Metal Complexes Based on Isonicotinic Acid N′-(10-Oxo-10H-phenanthren-9-ylidene)hydrazide

Abstract

Isonicotinic acid N′-(10-oxo-10H-phenanthren-9-ylidene)hydrazide (HL) and its complexes ML2 and MHLCl2 [М = Cu(II), Ni(II), Co(II), Fe(II), and Zn(II)] were synthesized. The structure and properties of the obtained compounds were studied by 1H NMR, IR, and X-ray absorption spectroscopy. The hydrazide structure was determined by X-ray diffraction. Quantum-chemical calculations of its tautomeric forms and electronic absorption spectra were carried out. In ML2 chelate complexes, the ligand is coordinated to metal atoms in the enol form, whereas in MHLCl2 complexes it is coordinated in the keto form.