Chemistry - Coordination Chemistry Question with Solution | TestHub

Crystal field splitting in octahedral complexes causes the d-orbitals to split into two sets: the lower energy $t_{2g}$ set ($d_{xy}$, $d_{yz}$, $d_{xz}$) and the higher energy $e_g$ set ($d_{x^2-y^2}$, $d_{z^2}$). The $t_{2g}$ orbitals are stabilized by $2/5{\Delta }_o$, and the $e_g$ orbitals are destabilized by $3/5{\Delta }_o$. Therefore, the energy of $d_{xy}$, $d_{yz}$, and $d_{xz}$ orbitals is lowered.