Write structures of various carbocations that can be obtained from 2-methylbutane. Arrange these carbocations in order of increasing stability.
Answers
Four possible carbocations are
Order of increasing stability I < IV < II < III
Answer: The carbocations are mentioned with the picture given below.
1<4<2<3 (stability order)
Explanation:
The stability of carbocation is as follows
Tertiary>secondary>primary (decreasing order)
The alkyl group is +I group
The more the number of alkyl group more is the stability of the carbocation as the positive charge gets neutralized by the alkyl group.
Out of 1 and 4, 4 is more stable than 1 because alkyl group is at beta carbon and +I effect decreases with increasing distance.
This is because stability of carbocation increases with +I effect increasing groups which are adjacent to the beta carboncarbon.
This is due to the effect of hyperconjugation and resonance.
