Synthesis and characterization of new transition metal complexes of schiff-base derived from 2-aminopyrimidine and 2,4-dihydroxybenzaldehyde and its applications in corrosion inhibition

Abstract

New complexes cis-[Mo2O5(Hapdhba)2], trans-[UO2(Hapdhba)2], [Pd(Hapdhba)Cl(H2O)], [Pd(bpy)(Hapdhba)]Cl, [Ag(bpy)(Hapdhba)], [Ru(Hapdhba)2(H 2O)2], [Rh(Hapdhba)2Cl(H2O)] and [Au(Hapdhba)Cl2] are reported, where H2apdhba is the Schiff-base derived from 2-aminopyrimidine and 2,4-dihydroxy benzaldehyde. The complexes were characterized by IR, electronic, 1H NMR and mass spectra, conductivity, magnetic and thermal measurements. The inhibitive effect of H2apdhba for the corrosion of copper in 0.5 M HCl was also determined by potentiodynamic polarization measurements.