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Stability of Carbocation

Which of the ...

Question

Which of the following carbocation is most stable?
(a) $(C H_{3})_{3} C . + C H_{2}$ (b) $(C H_{3})_{3} + C$
(c) $C H_{3} C H_{2} + C H_{2}$ (d) $C H_{3} + C H C H_{2} C H_{3}$

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Solution

$(C H_{3})_{3} + C$ is a tertiary carbocation. A tertiary carbocation is the most stable carbocation due to the electron releasing effect of three methyl groups. An increased + I effect by three methyl groups stabilizes the positive charge on the carbocation.

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Stability of Carbocation

Standard XII Chemistry

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