Synthesis, Characterization and Biocidal Profiles of BHNOPDA and its Fe2+ and Mn2+ ions complexes against Meloidogyne incognita

Two metal complexes have been synthesized from Mn (II) and Fe (II) chloride and ligandbis-2-hydroxy-1-naphthaldehyde-O-phenylenediamine (BHNOPDA) using the microwave assisted synthesis and were characterized using electronic spectra (ultra-violet - visible spectroscopy), Fourier Transformed infrared spectra (vibrational spectroscopy), molar conductivity measurement, solubility test and melting point determination. The metal complexes and ligand were insoluble in distilled water, but the complexes were completely soluble in methanol, ethanol, DMSO and DMF Fe2+ complex was insoluble in ethers and chloroform. Mn2+ and Fe2+ complexes were insoluble in acetone, chloroform and ethers. The melting point of both the ligand and the metal complexes showed they are thermally stable. The conductance data showed that the ligand is non-electrolytic but the metal complexes are electrolytic. The Schiff base and their metal complexes were have also been screened for their nematicidal activity against root knot nematode, Meloidogyne incognita. Metal complexes showed better nematicidal activity than Schiff base