A hypothetical metal M forms the following complexes with the generalized ligands X, Y, and Z: Complex ionObserved color
[M(X)6]3+green
[M(Y)6]3+blue
[M(Z)6]3+yellow
Order these ligands according to their ability to split d orbitals. In other words, set up a spectrochemical series, from strongest to weakest ligand field strength.
Spectrochemical series:
I− a. X Weakest Middle Strongest
b. Y Weakest Middle Strongest
c. Z Weakest Middle Strongest