Question

For a $d ^{4}$ metal ion in an octahedral field, the correct electronic configuration is :

• A. $t_{2 g}^{3} e_{g}^{1} \text { when } \Delta_{0} < P$
• B. $t_{2 g}^{3} e_{g}^{1} \text { when } \Delta_{0} > P$
• C. $t_{2 g}^{4} e_{g}^{0} \text { when } \Delta_{0} < P$
• D. $e_{g}^{2} t_{2 g}^{2} \text { when } \Delta_{0} < P$

Answer 1

Answer: (C)

back pairing is not possible because pairing energy $>\,\Delta_{o}$