SYNTHESIS AND INVESTIGATION OF MIXED AMIDE COORDINATION COMPOUNDS OF SOME 3D-METALS

Abstract

 This study presents the synthesis and characterization of mixed amidic coordination compounds of 3d-transition metals, including Cu(II), Ni(II), Co(II), and Zn(II). The research focuses on understanding the coordination behavior of amidic ligands and their influence on the structural, electronic, and thermal properties of the resulting complexes. The compounds were synthesized using standard complexation techniques, and their compositions were confirmed by elemental analysis. Infrared spectroscopy revealed the coordination of ligands through oxygen and nitrogen donor sites, as indicated by characteristic shifts in ν(C=O) stretching frequencies. UV-Vis spectral data demonstrated d–d electronic transitions typical of octahedral geometries for Cu(II), Ni(II), and Co(II) complexes, while Zn(II) complexes exhibited charge transfer bands. Thermal and X-ray diffraction analyses showed that the complexes possess high stability and nanoscale crystalline structures. Magnetic studies supported the proposed geometries and oxidation states of the metal centers. The study concludes that the type of metal ion and ligand system significantly influences the physicochemical properties of the complexes. These mixed amidic coordination compounds show promising potential in catalysis, materials science, and bioinorganic applications due to their structural stability, magnetic properties, and versatile coordination behavior.