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  4. A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following ?

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Q. A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following ?

NEETNEET 2020Organic Chemistry – Some Basic Principles and Techniques

Solution:

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Tertiary carbocations are stable due to inductive effect (+I effect of alkyl groups) and hyperconjugation.
Tert. carbocation has greater number of alpha H in comparison to sec carbocation. This increases hyperconjugation which results to its greater stability.