[Fe( H2O)6 ]2+ and [ Fe( CN)6 ]2+ have H2O and CN– ligands respectively. CN– has a higher CFSE (crystal field splitting energy) than water because it is a strong field ligand. As a result, different wavelengths of light are absorbed and returned by the d-d transitions. As a result, they have various colours in a solution.
are of different colours in dilute solutions. Why?
are of different colours in dilute solutions. Why?