|Themes > Science > Chemistry > Miscellenous > Help file Index > Complex Ions > Crystal field theory: spectrochemical series|
The size of D is determined by the ligands that
surround the metal ion. Chemists have derived what is known as the
spectrochemical series to list approximately how strong a given ligand
is: an abbreviated version is shown below
Example: Which of the following complexes is most likely to be high spin?
Solution: Compare the ligands on the spectrochemical series. Since we want a high spin complex, we want a weak field ligand. The weakest field ligand in the above is H2O, so the water complex is most likely to be high spin. (The cyanide complex is least likely.)