Novel Schiff base ligand based on coumarin precursor was prepared by the condensation of 3-acetyl coumarin with 3-aminophenol. The newly synthesized Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) complexes were characterized by elemental analysis, molar conductance, spectroscopic techniques (IR,1H NMR, mass spectrometry, UV–Vis), and thermal (TG/DTG) to predict their structur...