9.17 What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.
The arrangement of ligands in the increasing order of their crystal-field splitting energy (CFSE) values is known as spectrochemical series.
The ligands on the right side of the series strong field ligands are present whereas on the left-hand side weak field ligands are present.
The strong field ligands are capable of splitting d orbitals to a higher extent as compared to weak field ligands.