Synthesis, Spectral Characterization and Nematicidal activity studies of 2-[(2 -Nitrophenylimino) Methyl] Phenol and 2-[(4- Nitrophenyliminomethyl)]phenol Ligands and their FE(II) and NI(II) Complexes

Abstract

Four complexes of Fe(II) and Ni(II) with2-[(2 -nitrophenylimino) methyl] phenol(L1) and 2-[(4- nitrophenyliminomethyl)] phenol(L2) Schiff bases have been prepared via the microwave assisted method. The ligands and their corresponding complexes were characterized on the basis of physical properties, elemental analysis, MS, FTIR, ¹H-NMR and ¹³C-NMR spectroscopy and electronic spectra. The FTIR spectra of the complexes showed that the ligands L₁ and L₂ had bidentate character coordinating through the nitrogen and oxygen atoms. On coordination, results showed that the ¹H-NMR and ¹³C-NMR data of L₁ and L₂ confirmed the formation of the complexes of Fe(II) and Ni(II). The probable coordination geometries of Fe(II) and Ni(II) were octahedral. All the metal complexes were found to be non-electrolytes in ethanol. Nematicidal studies proved that the ligands and their metals showed appreciable nematicidal properties against the root knot nematode Meloidogyne arenariawith the metal complexes exhibiting higher ability than the free ligands.