Chapter 19, Problem 94AE

Interpretation Introduction

Interpretation: The given species needs to be classified as strong or weak field.

Concept Introduction:

Crystal field theory is the theory given to explain the bonding in the coordination complexes. As ligand approaches towards the metal ion, the d-orbital of metal ion divide according to the energy of metal ion. On the basis of energy and degeneracy, the d-orbital can be classified as ${\text{t}}_{\text{2g}}$ and ${\text{e}}_{\text{g}}$ orbitals. The electrons will fill according to their energy levels.

In octahedral complexes, the ${\text{t}}_{\text{2g}}$ orbitals are the lower energy orbitals and ${\text{e}}_{\text{g}}$ orbitals are higher energy orbitals. Because of lower energy, electrons first occupy in ${\text{t}}_{\text{2g}}$ orbitals and later occupy in ${\text{e}}_{\text{g}}$ orbitals.