Question:
Alkyl chloride when treated with sodium iodide in presence of dry acetone forms alkyl iodide. What is the name of this reaction?
Alkyl chloride when treated with sodium iodide in presence of dry acetone forms alkyl iodide. What is the name of this reaction?
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In the Finkelstein reaction, an alkyl halide undergoes a halogen exchange with a sodium halide (NaI) in acetone to form an alkyl iodide.
Updated On: Feb 18, 2026
- Swarts reaction
- Wurtz reaction
- Wurtz - Fittig reaction
- Finkelstein reaction
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Finkelstein reaction.
The Finkelstein reaction is a halogen exchange reaction in which an alkyl halide reacts with a sodium halide (like NaI) in acetone, leading to the substitution of one halogen with another (e.g., Cl$\to$I).
Step 2: Analyzing the options.
(A) Swarts reaction: The Swarts reaction is a halogen exchange reaction, but it uses chlorine and fluorine as reactants and involves different conditions.
(B) Wurtz reaction: The Wurtz reaction is a coupling reaction between two alkyl halides, not a halogen exchange.
(C) Wurtz - Fittig reaction: This reaction involves both halogenation and coupling, but it is not a halogen exchange reaction.
(D) Finkelstein reaction: This is the correct answer as it specifically describes the halogen exchange between alkyl chloride and sodium iodide in acetone.
Step 3: Conclusion.
The correct answer is (D) Finkelstein reaction.
The Finkelstein reaction is a halogen exchange reaction in which an alkyl halide reacts with a sodium halide (like NaI) in acetone, leading to the substitution of one halogen with another (e.g., Cl$\to$I).
Step 2: Analyzing the options.
(A) Swarts reaction: The Swarts reaction is a halogen exchange reaction, but it uses chlorine and fluorine as reactants and involves different conditions.
(B) Wurtz reaction: The Wurtz reaction is a coupling reaction between two alkyl halides, not a halogen exchange.
(C) Wurtz - Fittig reaction: This reaction involves both halogenation and coupling, but it is not a halogen exchange reaction.
(D) Finkelstein reaction: This is the correct answer as it specifically describes the halogen exchange between alkyl chloride and sodium iodide in acetone.
Step 3: Conclusion.
The correct answer is (D) Finkelstein reaction.
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