Question

Calculate CFSE values for the following system.

$d^5$- low spin octahedral :

• A. $2.4{\Delta }_0$
• B. $-0.4{\Delta }_0$
• C. $-2.0{\Delta }_0$
• D. $0.6{\Delta }_0$

Answer 1

The correct option is C $-2.0{\Delta }_0$

Option (C) is correct.

In $d^5$- low spin octahedral, 5 electrons their in $t_{2g}$ and 0 electrons in $e_g$.

By applying formula,

$\Delta$ for octahedral complex = no. of electrons in $e_g$·(0.6)+ no. of electrons in $t_{2g}$(-0.4)

$=0\left(0.6\right)+5(-0.4)$

$=-2.0$ ${\Delta }_0$