Which of the following complexes has the high | vedclass

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(B) The magnitude of crystal field splitting energy $(\Delta_o)$ depends on the nature of the ligand and the oxidation state of the metal ion.
$1$. S

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$[Ru(CN)_6]^{3-}$

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(B) The magnitude of crystal field splitting energy $(\Delta_o)$ depends on the nature of the ligand and the oxidation state of the metal ion.
$1$. Strong field ligands like $CN^{-}$ cause larger splitting compared to weak field ligands like $H_2O$ or $NH_3$.
$2$. For the same ligand,$\Delta_o$ increases as we move down a group in the periodic table because the $4d$ and $5d$ orbitals are more extended than $3d$ orbitals.
$3$. Comparing $[Fe(CN)_6]^{3-}$ ($3d$ metal) and $[Ru(CN)_6]^{3-}$ ($4d$ metal),the complex with the $4d$ metal $(Ru)$ will have a significantly higher $\Delta_o$ value.
Therefore,$[Ru(CN)_6]^{3-}$ has the highest crystal field splitting energy.

Which of the following complexes has the highest value of crystal field splitting energy $(\Delta_o)$?

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