Which of the following complex ions is most s | vedclass

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(B) The stability of a complex ion is influenced by the nature of the ligand and the chelate effect. $CN^-$ is a strong field ligand that forms a very

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

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(B) The stability of a complex ion is influenced by the nature of the ligand and the chelate effect. $CN^-$ is a strong field ligand that forms a very stable complex with $Co^{3+}$. Additionally,the stability of coordination complexes is often determined by the chelate effect,where polydentate ligands like oxalate $(C_2O_4^{2-})$ form more stable complexes than monodentate ligands. However,among the given options,$[Co(CN)_6]^{3-}$ is exceptionally stable due to the strong field nature of the $CN^-$ ligand,which causes large crystal field splitting energy $(CFSE)$. Thus,$[Co(CN)_6]^{3-}$ is the most stable complex.

Which of the following complex ions is most stable?

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