Among the following species the one which causes the highest $\mathrm{CFSE}, \Delta_{\mathrm{o}}$ as a…
Among the following species the one which causes the highest $\mathrm{CFSE}, \Delta_{\mathrm{o}}$ as a ligand is:
$\mathrm{CN}^{-}$
$\mathrm{NH}_{3}$
$\mathrm{F}^{-}$
$\mathrm{CO}$
Solution
Following is the order of increasing value of $\Delta_{\mathrm{o}}$ for the ligands. $\mathrm{I}^{-} < \mathrm{Br}^{-} < \mathrm{Cl}^{-} < \mathrm{F}^{-} < \mathrm{H}_{2} \mathrm{O} < \mathrm{Py}=\mathrm{NH}_{3} < \mathrm{en} < $
$\mathrm{NO}_{2}^{-}< < \mathrm{CN}^{-} < \mathrm{CO}$
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