Question:medium

Which of the following is a least stable carbocation?

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Stability order of common carbocations: Benzyl>Allyl $\approx$ 3$^\circ$>2$^\circ$>1$^\circ$>Methyl. Vinylic and Aryl carbocations (where the charge is on a double-bonded carbon) are extremely unstable and are less stable than even the methyl carbocation.

Updated On: Mar 30, 2026

CH$_3$ - C$^+$H$_2$
CH$_2$ = C$^+$H
CH$_2$ = CH - C$^+$H$_2$
C$_6$H$_5$ - C$^+$H$_2$

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The Correct Option is B

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