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in Organic Chemistry - Some Basic Principles and Techniques by (49.4k points)

Which of the following will have more hyperconjugation ? Explain with reason
\(\left({C} {H}_{3}\right)_{2}^{\oplus} {C H},^{\oplus}{C H}_{2} {C H}_{3}\)

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\(\left({CH}_{3}\right)_{2} \stackrel{\oplus}{{C}} {H}\):

carbocation will have more hyperconjugation than \(^{\oplus} {CH}_{2} {CH}_{3}\) because it is a secondary carbocation due to presence of two methyl groups on the carbon atom having positive charge. Greater the number of alkyl groups in a carbocation, greater will be the hyperconjugation and greater will be the stability of that carbocation.

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