JEE Main 2013 Chemistry question

Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction ?

Answer: (3)

Solution

(1), (2) and (4) all generate the sec-butyl carbocation (directly or by rearrangement of the n-butyl cation), giving 2-phenylbutane.

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Question ID VK-104029