Synthesis, spectral analysis, stability constants, antioxidant and biological activities of Co (II), Ni (II) and Cu (II) mixed ligand complexes of nicotinamide, theophylline and thiocyanate

The determination of molar ratio. Job's method of continuous variations produced one maximum for all complexes and is [M2+]/{[M2+] + [Mixed Ligand] ∼ 0.352. Two molecules of ligand react with one molecule of metal (II) ion.112