The effect of coordination number on the NPA charge is also clearly visible. For instance, in the case of Nd-4-PF6 -complexes, the NPA charge on the Nd center decreases from 2.31 to 2.25 to 2.20 to 2.14 on going from 9CN to 10CN to 11CN to 12CN, implying a greater amount of charge transfer from coordinated PF6 -to Nd center with the increase of CN. This observation is also true for Nd-5-PF6 -, Nd-6-PF6 -, and Nd-7-PF6 -complexes.