The three orbitals i.e., t2g orbitals are close to approaching ligands. As a result of this, the t2g electrons suffer more repulsions than eg electrons. The energy of t2g orbitals increases more than eg orbitals. The splitting is shown below:
The energy gap between two sets of orbitals is designated as Δt. It is observed that Δt, is considerably less than Δo. It has been found that.
\(\Delta_T = \frac 49 \Delta_O\)
