Ncert Exercises & Solutions

Question 12.38:
Which of the following carbocation is most stable?
(a) ${({CH}_{3})}_{3} C \cdot {CH}_{2}$

(b) ${(C H_{2})}_{3} \overset{+}{C}$
(c) $C H_{3} C H_{2} C H_{2}$

(d) $C H_{3} \overset{+}{C} H C H_{2} C H_{3}$

_{$(C H_{3}) C$} 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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