Ligands for which Do < P are known as weak
field ligands and form high spin complexes (ii) If Do > P, it becomes more energetically favourable for the fourth
electron to occupy a t2g orbital with configuration t2g
4eg
0 Ligands
which produce this effect are known as strong field ligands and
form low spin complexes Calculations show that d
4 to d
7 coordination entities are more
stable for strong field as compared to weak field cases