Question

The crystal Field stabilization Energy $(CFSE)$ of $\left[Co{F}_3{\left(H_{2}O\right)}_3\right]\left({\Delta }_0<P\right)$ is :-

• A. $-0.8{\Delta }_0$
• B. $-0.4{\Delta }_0+P$
• C. $-0.8{\Delta }_0+2P$
• D. $-0.4{\Delta }_0$

Answer 1

Answer: (B)

$\left[Co{F}_3{\left(H_{2}O\right)}_3\right]{\Delta }_0<P$

Means all ligands behaves as weak field ligands



$=[-0.4\times 4+0.6\times 2]{\Delta }_0$

$=[-1.6+1.2]{\Delta }_0$

$=\left[-0.4{\Delta }_0\right]$