Which of the following is the most stable com | vedclass

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(B) The stability of a coordination complex depends on the nature of the ligand. $CN^-$ is a strong field ligand that forms very stable complexes due

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

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(B) The stability of a coordination complex depends on the nature of the ligand. $CN^-$ is a strong field ligand that forms very stable complexes due to its ability to form strong $\sigma$-bonds and $\pi$-backbonding with the metal center. Between $[Fe(CN)_6]^{3-}$ and $[Fe(CN)_6]^{4-}$,the complex $[Fe(CN)_6]^{3-}$ has a higher charge density on the metal center $(Fe^{3+})$,which leads to a higher crystal field stabilization energy $(CFSE)$ and greater overall stability compared to the $Fe^{2+}$ complex.

Which of the following is the most stable complex ion?

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