The correct increasing order of stability of the complexes based on \( \Delta \) value is:
Show Hint
- \( {IV}<{III}<{II}<{I} \)
- \( {I}<{II}<{IV}<{III} \)
- \( {III}<{II}<{IV}<{I} \)
- \( {II}<{III}<{I}<{IV} \)
The Correct Option is C
Solution and Explanation
The stability of complexes is often related to the value of \( \Delta \), which is the energy difference between the d-orbitals in the ligand field. Higher \( \Delta \) values typically correspond to more stable complexes.
Based on the \( \Delta \) values:
- \( [{Fe(CN)}_6]^{3-} \) has the highest \( \Delta \) value due to the strong field ligand \( {CN}^- \), making it the most stable complex.
- \( [{Co(CN)}_6]^{3-} \) is slightly less stable compared to \( [{Fe(CN)}_6]^{3-} \).
- \( [{Mn(CN)}_6]^{3-} \) has the lowest \( \Delta \) value and is the least stable among these complexes. Thus, the correct increasing order of stability is \( {III}<{II}<{IV}<{I} \).
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