Which is the least stable carbocation? I. CH3CH2 overset+CH2 II. CH3 overset+CHCH3 III. (CH3)4 overset+C VI. (CH3)3 C overset+CH2

Question

Which is the least stable carbocation? I. CH3CH2 overset+CH2 II. CH3 overset+CHCH3 III. (CH3)4 overset+C VI. (CH3)3 C overset+CH2  (A) I (B) II (C) III (D) IV

Tardigrade Admin · Accepted Answer

Stability of carbocation depends upon the number of hyperconjugative structures. More the hyperconjugative structure (i.e., more the number of hydrogen atoms attached directly to a-carbon atom), more is the stability of carbocation
Thus, the order of stability of given carbocation is

Thus,

(C H_{3})_{3} CC H_{2} + (I V)

is least stable carbocation among the given

Q. Which is the least stable carbocation? I. CH3​CH2​C+H2​ II. CH3​C+HCH3​ III. (CH3​)4​C+ VI. (CH3​)3​CC+H2​

I

II

III

IV

Q. Which is the least stable carbocation?
I. $C H_{3} C H_{2} C + H_{2}$
II. $C H_{3} C + H C H_{3}$
III. $(C H_{3})_{4} C +$
VI. $(C H_{3})_{3} C C + H_{2}$