Question:
Identify the reagent used for replacement of \(-\text{N}_2^+\text{Cl}^-\) from benzene diazonium chloride by iodine.
Identify the reagent used for replacement of \(-\text{N}_2^+\text{Cl}^-\) from benzene diazonium chloride by iodine.
Show Hint
Iodine is introduced with potassium iodide, no copper salt required.
Updated On: Oct 1, 2026
- HI
- KOI
- KI
- \(\text{PI}_3\)
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Reaction
Benzene diazonium chloride reacts with \(KI\) to give iodobenzene: \(C_6H_5N_2^+Cl^- + KI \rightarrow C_6H_5I + N_2 + KCl\).
Step 2: Why
Iodide is a good nucleophile and does not need a copper catalyst. \(HI\), \(KOI\) and \(PI_3\) are not used for this replacement.
Final Answer:
Potassium iodide, KI, is the reagent. \[ \boxed{\text{(C)}\ KI} \]
Benzene diazonium chloride reacts with \(KI\) to give iodobenzene: \(C_6H_5N_2^+Cl^- + KI \rightarrow C_6H_5I + N_2 + KCl\).
Step 2: Why
Iodide is a good nucleophile and does not need a copper catalyst. \(HI\), \(KOI\) and \(PI_3\) are not used for this replacement.
Final Answer:
Potassium iodide, KI, is the reagent. \[ \boxed{\text{(C)}\ KI} \]
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