According to the barycentre rule in an octahedral crystal field, the energy of the triply degenerate — Coordination Compounds Chemistry Question

💡 Solution & Explanation

To conserve energy around the barycentre, the three $t_{2g}$ orbitals are stabilized (lowered) by $-0.4 \Delta_o$ (or $-4 Dq$) each, while the two $e_g$ orbitals are destabilized by $+0.6 \Delta_o$ each.