Question:
Identify a lowest field strength ligand from following.
Identify a lowest field strength ligand from following.
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Halides are weak field ligands ($I^-$ is weakest), while $CN^-$ and $CO$ are strong field ligands.
Updated On: Apr 30, 2026
- I$^{-}$
- S$^{2-}$
- en
- CO
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The Correct Option is A
Solution and Explanation
Step 1: Spectrochemical Series
Ligands are arranged by their crystal field splitting power ($\Delta$).
Step 2: Comparison
Order: $I^-<Br^-<S^{2-}<Cl^-<F^-<OH^-<H_2O<NH_3<en<CN^-<CO$.
Step 3: Analysis
Iodide ($I^-$) is at the very beginning of the series, indicating the weakest field.
Step 4: Conclusion
$I^-$ has the lowest field strength.
Final Answer:(A)
Ligands are arranged by their crystal field splitting power ($\Delta$).
Step 2: Comparison
Order: $I^-<Br^-<S^{2-}<Cl^-<F^-<OH^-<H_2O<NH_3<en<CN^-<CO$.
Step 3: Analysis
Iodide ($I^-$) is at the very beginning of the series, indicating the weakest field.
Step 4: Conclusion
$I^-$ has the lowest field strength.
Final Answer:(A)
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