Assessment of the Equilibrium Constants of Mixed Complexes of Rare Earth Elements with Acidic (Chelating) and Organophosphorus Ligands

A survey of the experimental equilibrium constants in solution for mixed complexes 4f ions with acidic (chelating) and O-donor organophosphorus ligands published period between 1954 2022 is presented. These data are widely used both analytical solvent extraction chemistry. Important evaluation criteria involved specification essential reactions, process conditions correctness techniques calculations used, as well appropriate analysis data. Higher-quality have been evaluated, compiled presented herein, providing a synoptic view unifying theme this area research, i.e., synergism.