Reactivity of the new potentially Binucleating Ligand, 2-(Acetichydrazido-N-Methylidene-α-Naphthol)-Benzothiazol, towards Manganese(II), Nickel(II), Cobalt(II), Copper(II) and Zinc(II) salts

A new series of manganese(II), nickel(II), cobalt(II), copper(II) and zinc(II) complexes of 2-(acetichydrazido-N-methylidene-α-naphthol)-benzothiazol (H₂L) was prepared and characterized by elemental analysis, IR, UV-VIS, magnetic susceptibility, thermogravimetric analysis (TGA), molar conductance and ESR measurements. Molar conductances of the complexes in DMF are commensurate with their nonelectrolytic nature. IR spectral data show that the ligand can be bidentate and/or tridentate. ESR spectra of the solid copper(II) Complexes 8 and 9 show a d_{x² − y²}ground state with covalent character. The fungicidal activities of the ligand and its metal complexes against Aspergillus niger and Fusarium oxysporum are discussed.