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JEE Main · 2022 · 29 Jun 2022 · Shift 2 · General Organic Chemistry

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Which of the following carbocations is most stable :
  1. (A)(see structure)
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)
    ✓ Correct

Answer: (D)

Solution

The most stable carbocation is option (D) because it has extended conjugation. The positive charge can be delocalized through the conjugated system involving the double bonds and the methoxy group (–OCH₃). The methoxy group is electron-donating through resonance (+M effect), which stabilizes the adjacent positive charge. The extended conjugation over multiple double bonds provides maximum resonance stabilization compared to the other options.

JEE Main · 2022 · 29 Jun 2022 · Shift 2 · Single correct option

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