Which one of the following carbocation is most
stable?

C H_{3} - C H_{2} - C H_{2}^{\oplus}

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C H_{3} - C H_{2} - C H_{2} - C H_{2}^{\oplus}

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C H_{3} - C H^{\oplus} - C H_{3}

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C H_{3} - C H_{2} - C H^{\oplus} - C H_{3}

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Solution

The correct option is C $C H_{3} - C H^{\oplus} - C H_{3}$
Th carbocation $C H_{3} - C H^{\oplus} - C H_{3}$ is most stable.
The general stability order of alkyl carbocations is $tertiary alkyl > secondary alkyl > primary alkyl > methyl$
The compounds of option A to D represents primary, primary, secondary and secondary carbocations respectively.
The carbocation C is more stable than carbocation D as it has more hyperconjugative structures.

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Similar questions

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H | C H_{3} - C | C H_{3} - C H_{3} - C H_{2} - C H_{3} | C H - C H_{2} - C H_{2} - C H_{2} - C H_{3}

C H_{3} - C H_{2} - C H_{3} | C H - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{2} - C H_{3} | C H - C H_{3}

A . C H_{3} - C H = C H_{2} + H C l ⟶ C H_{3} - C | C l H - C H_{3}

B . C H_{3} - C H = C H_{2} + H B r ⟶ C H_{3} - C H_{2} - C H_{2} B r

C . C H_{3} - C H = C H_{2} + H B r p e r o x i d e - ---- \to C H_{3} - C H_{2} - C H_{2} - B r

D . C H_{3} - C H = C H_{2} + H I p e r o x i d e - ---- \to C H_{3} - C | I H - C H_{3}

C H_{3} - C H_{2} - \oplus C H_{2}

C H_{3} - C H | F - \oplus C H_{2}

C H_{3} - C H | B r - \oplus C H_{2}

C H_{3} - C H | C l - \oplus C H_{2}

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