Abstract
Five novel aminomethylphosphinic acid ligands (L1–L5) have been synthesized and characterized. The pH-potentiometric technique was used for determining the dissociation constants (pK) of the compounds. The stabilizing ability of complexes of a novel chiral ligand of bis(aminomethyl)phosphinic acid (L1) with transition metals such as Co2+, Ni2+, Zn2+, Fe2+, Cu2+, Cd2+ and lanthanide ions La3+, Gd3+ in aqueous solutions have been studied by the pH-potentiometric technique. The complexation studies show that there is a significant difference between transition metals and lanthanide ions.
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