Studies on multistage enantioselective liquid-liquid extraction of amino-(4-nitro-phenyl)-acetic acid enantiomers using CuPF6{(S)-BINAP}: Experiments and modeling

Figure shows the equal ee for multistage enantioselective liquid-liquid extraction of amino-(4-nitro-phenyl)-acetic acid (PGL) enantiomers as a function of CuPF6{(S)-BINAP} concentration and PF6− concentration. CuPF6{(S)-BINAP} concentration of 1 · 10−3 mol/L and PF6− concentration of 2 · 10−3 mol/L are taken as the optimal values for symmetrical separation of PGL enantiomers.