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NEET 2026
Exam
NEET
Year
2026
Subject
Chemistry
Chapter
Chapter

NEET 2026 · Chemistry · Chapter

Consider the chemical reaction shown in the given figure. Which of...

Consider the chemical reaction shown in the given figure. Which of the following correctly identifies the major
Consider the chemical reaction shown in the given figure.

Which of the following correctly identifies the major products P and Q?

Options

  1. AIodobenzene and tert-butyl alcohol
  2. BPhenol and tert-butyl iodide
  3. CPhenol and isobutyl iodide
  4. DIodobenzene and isobutyl alcohol

Correct answer

B. Phenol and tert-butyl iodide

Step-by-step solution

The given reaction is the cleavage of tert-butyl phenyl ether by hydroiodic acid (HI).

First, the ether oxygen is protonated by HI to form an oxonium ion.

The cleavage of the C-O bond can occur in two ways. However, the C-O bond between the phenyl ring and the oxygen atom has partial double bond character due to resonance, making it stronger and difficult to break. Furthermore, cleavage of the C-O bond between the tert-butyl group and the oxygen atom results in the formation of a highly stable tert-butyl carbocation via an SN1S_N1 mechanism.

Therefore, the bond breaks to yield phenol and a tert-butyl carbocation.

The tert-butyl carbocation is then attacked by the iodide ion (I−I^-) to form tert-butyl iodide.

Thus, the major products P and Q are phenol and tert-butyl iodide.

Answer: Phenol and tert-butyl iodide
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