For a d4 metal ion in an octahedral field,

$\mathrm{t}_{2 \mathrm{~g}}^{4} \mathrm{e}_{\mathrm{g}}^{0}$ when $\Delta_{\mathrm{O}}<\mathrm{P}$

$\mathrm{e}_{\mathrm{g}}^{2} \mathrm{t}_{2 \mathrm{~g}}^{2}$ when $\Delta_{\mathrm{O}}<\mathrm{P}$

$\mathrm{t}_{2 \mathrm{~g}}^{3} \mathrm{e}_{\mathrm{g}}^{1}$ when $\Delta_{\mathrm{O}}<\mathrm{P}$

$\mathrm{t}_{2 \mathrm{~g}}^{3} \mathrm{e}_{\mathrm{g}}^{1}$ when $\Delta_{\mathrm{O}}>\mathrm{P}$