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Question

What is the intermediate formed during the dehydration of butan-2-ol to but-2-ene?

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Explanation

Dehydration of butan-2-ol (CH₃CH(OH)CH₂CH₃) with conc. H₂SO₄ proceeds via an E₁ mechanism, forming a carbocation (CH₃CH+CH₂CH₃) as the intermediate.

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