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Question
Which of the following is true regarding the stability of the following carbocation?
Which of the following is true regarding the stability of the following carbocation?
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Solution
The correct option is A I<II
(II) is more stable since it has five α−H atoms whereas (I) has three α−H atoms. That is why (I) undergoes ring expansion by 1,2-hydride shift. The shifts are always 1,2 not 1,3.
(II) is more stable since it has five α−H atoms whereas (I) has three α−H atoms. That is why (I) undergoes ring expansion by 1,2-hydride shift. The shifts are always 1,2 not 1,3.
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