Question:
Arrange following complex ions in increasing order of crystal field splitting energy (DO) :
[Cr(Cl)6]3–, [Cr(CN)6]3–, [Cr(NH3)6]3+.
Solution:
The increasing order of crystal field energy is
[Cr(Cl)6]3–<[Cr(NH3)6]3+ <[Cr(CN)6]3–
This is also the order of field strength of the ligands according to the spectrochemical series.