The number of hyperconjugation structures inv | vedclass

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Question

(D) $1$. The reaction of the given alcohol with $HBr$ proceeds via the formation of a carbocation intermediate.$2$. Initially,the $OH$ group is proton

Vedclass · Accepted Answer

$7$

Vedclass · Answer

(D) $1$. The reaction of the given alcohol with $HBr$ proceeds via the formation of a carbocation intermediate.$2$. Initially,the $OH$ group is protonated to form a good leaving group $(-OH_2^+)$,which then leaves to form a secondary carbocation.$3$. This secondary carbocation undergoes a methyl shift to form a more stable tertiary carbocation.$4$. Subsequently,a hydride shift occurs to form an even more stable tertiary carbocation at the bridgehead position.$5$. The final stable carbocation has $7$ alpha-hydrogens ($3$ from the $CH_3$ group and $4$ from the adjacent ring carbons).$6$. The number of hyperconjugation structures is equal to the number of alpha-hydrogens,which is $7$.

The number of hyperconjugation structures involved to stabilize the carbocation formed in the above reaction is $.............$.

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