Which of the following complex will show largest splitting of -orbitals? [2023]

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Solution

Q.
Which of the following complex will show largest splitting of $d$ -orbitals [2023]

1 ${[Fe {(C_{2} O_{4})}_{3}]}^{3 -}$

2 ${[Fe {(CN)}_{6}]}^{3 -}$

3 ${[Fe {({NH}_{3})}_{6}]}^{3 +}$

4 ${[{FeF}_{6}]}^{3 -}$

Ans.
(2)

${CN}^{-}$ is a strong ligand, so ${[Fe {(CN)}_{6}]}^{3 -}$ has maximum CFSE.

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