We have also performed a NPA charge analysis for the complexes in the RTIL medium. As shown in Table , for similar coordinated complexes, the NPA charge on the RE cations decreases with the increase of the number of coordinated PF6 -anions, although the difference between Nd-6-PF6 -, and Nd-7-PF6 - complexes is negligible. For example, the NPA charge on the Nd-center for 9CN complexes decreases from 2.42 for Nd 39CN to 2.25 for Nd 79CN, where the difference between Nd 69CN and Nd 79CN is not significant.