SYNTHESIS AND CHARACTERISATION OF CU (II) AND FE (II) METAL COMPLEXES WITH SALICYLIC ACID

Abstract

This study focuses on the synthesis and characterization of copper (II) and iron (II) complexes with salicylic acid as a ligand, using a solvent method. The complexes were prepared by reacting the metal salt solutions with salicylic acid in ethanol. The synthesis was confirmed by color changes and monitored pH levels, with a 79.08% yield for the Cu (II) complex and 60.25% for the Fe (II) complex. The characterization techniques included UV-Vis and FTIR spectroscopy, conductivity measurements, solubility testing, melting point determination, and atomic absorption spectroscopy (AAS). The UV-Vis spectra showed shifts indicative of complex formation, while FTIR spectra confirmed coordination through the hydroxyl and carboxylic groups of salicylic acid. Conductivity results suggested a non-electrolytic nature, and solubility tests indicated the complexes' compatibility with organic solvents. Melting point analysis demonstrated thermal stability, and AAS validated the metal-to-ligand stoichiometry. The findings suggest these complexes’ potential for applications in non-aqueous media, catalytic, and indicate a foundation for further exploration of their biological and industrial properties.