Synthesis,Characterization, and Thermal Investigation of Some Metal Complexes Containing Polydentate ONO-Donor Heterocyclic Schiff Base Ligand

Cu(II), Co(II), Ni(II), and Zn(II) metal complexes with new heterocyclic Schiff base derived from 1-amino-5-benzoyl-4-phenyl-1H-pyrimidine-2-one and 3-methoxysalicylaldehyde have been synthesized and characterized on the basis of elemental analyses, electronic, IR, and ¹H NMR spectra, and also by aid of molar conductivity measurements, magnetic moment measurements, and thermogravimetric analyses. It has been found that the Schiff base behaves as a neutral bidentate (NO) and tridentate (ONO) ligand forming chelates with 1 : 2 (metal : ligand) stoichiometry. Octahedral configuration is suggested for metal complexes. The conductivity data for the Ni(II) complexes are consistent with those expected for a 1 : 2 electrolyte.