The reaction of an alkyl chloride with sodium iodide in dry acetone to prepare an alkyl iodide is known by which name?
Answer and explanation
Correct answer: C. Finkelstein reaction
- Step 1: The halogen exchange reaction between alkyl halides and metal iodides is known as the Finkelstein reaction: .
- Step 2: Sodium iodide is soluble in acetone, whereas sodium chloride and sodium bromide are virtually insoluble in acetone.
- Step 3: The precipitation of solid shifts the equilibrium forward according to Le Chatelier's principle, driving the reaction to completion.
Answer
Finkelstein reaction.
Why not the others: Swarts reaction is used to prepare alkyl fluorides using metallic fluorides such as ; Wurtz reaction couples alkyl halides to form alkanes using sodium metal; Sandmeyer reaction replaces diazonium groups on aryl rings with halogens using copper(I) salts.
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