Explain the Crystal field splitting is an octahedral field.

Explanation

(a) When ligand approach the central metal ion the electrons in the d-orbitals of central metal ion will be repelled by the lone paris of the ligand. Because of there interactions, the degeneracy of the d-orbitals of the metal ion is lost and it splits into two sets of orbitals having different energies. The splitting of d-orbital is as shown in the figure.