Organic Chemistry Some Basic Principles and Techniques - Result Question 33
####39. A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
[2020]
(a) $+R$ effect of $-CH_3$ groups
(b) $-R$ effect of $-CH_3$ groups
(c) Hyperconjugation
(d) - I effect of $-CH_3$ groups
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Solution:
- (c)
CC+C
Tertiary butyl carbocation ( $9 \alpha-H$ atoms)
Secondary butyl carbocation ( $5 \alpha-H$ atom)
$t$-Butyl carbocation is more stable due to hyperconjugation.
