In the following carbocation, H / CH 3 that is most likely to migrate to the positively charged carbon is

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In the following carbocation, $\mathrm{H} / \mathrm{CH}_3$ that is most likely to migrate to the positively charged carbon is

ChemistryGeneral Organic ChemistryJEE AdvancedJEE Advanced 2009 (Paper 2)

Options:

A
$\mathrm{CH}_3$ at $\mathrm{C}-4$
B
$\mathrm{H}$ at $\mathrm{C}-4$
C
$\mathrm{CH}_3$ at $\mathrm{C}-2$
D
$\mathrm{H}$ at $\mathrm{C}-2$

Solution:

2837 Upvotes Verified Answer

The correct answer is:
$\mathrm{H}$ at $\mathrm{C}-2$

Hydride shift from $\mathrm{C}-2$ will give most stable resonance stabilised carbocation as Fig.

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