Synthesis and Spectral Characterization of Mixed Ligand Complexes of Co(II), Ni(II), and Cu(II) with 5‐Methyluracil, Amino Acids, and N‐(2‐Acetamido)iminodiacetic Acid

Abstract

Mixed ligand ternary metal complexes of some divalent transition metal ions [Co(II), Ni(II), and Cu(II)] with 2,4‐dihydroxy‐5‐methylpyrimidine (5‐methyluracil, HL¹) and some dicarboxylic amino acids (aspartic and glutamic, H₂L²) or basic amino acids (asparagine and glutamine, HL²) as well as N‐(2‐acetamido)iminodiacetic acid as disodium salt (Na₂ADA, H₂L²) were prepared. The structure of the complexes was characterized by the elemental and thermal analyses, IR, and electronic spectra as well as the conductivity measurements. Six‐coordinated metal complexes were suggested for the various isolated ternary complexes of Co(II), Ni(II), and Cu(II), with molecular formulas dependent on the nature of amino acids or Na₂ADA ligands (L²) present.

Keywords:

• Electronic visible spectra
• IR spectroscopy
• 5‐Methyluracil ternary metal complexes