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Question

(A) The reaction of $1$-methyl$-1-$vinylcyclopentane with $HBr$ proceeds via an electrophilic addition mechanism. $1$. The $H^+$ ion from $HBr$ attack

Vedclass · Accepted Answer

$1-$bromo$-1-$methylcyclohexane

Vedclass · Answer

(A) The reaction of $1$-methyl$-1-$vinylcyclopentane with $HBr$ proceeds via an electrophilic addition mechanism. $1$. The $H^+$ ion from $HBr$ attacks the double bond to form a more stable carbocation. $2$. The initial carbocation formed is a secondary carbocation on the side chain. $3$. To increase stability,the five-membered ring undergoes ring expansion to form a more stable six-membered ring carbocation. $4$. Finally,the $Br^-$ ion attacks the carbocation to form $1$-bromo$-1-$methylcyclohexane as the major product.

Product $(A)$ is

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The product $(x)$ is

What are $X$ and $Y$ respectively in the following sets of reactions?
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Product $(B)$ is

The state of hybridisation of $C_2, C_3, C_5$ and $C_6$ of the hydrocarbon $CH_3-C_6(CH_3)_2-C_5H=C_4H-C_3H(CH_3)-C_2 \equiv C_1H$ is in the following sequence:

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