Which of the following alcohols shows the fas | vedclass

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(D) The reaction of alcohols with $HI$ proceeds via the formation of a carbocation intermediate. The rate of reaction depends on the stability of the

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Benzyl alcohol $(C_6H_5CH_2OH)$

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(D) The reaction of alcohols with $HI$ proceeds via the formation of a carbocation intermediate. The rate of reaction depends on the stability of the carbocation formed after the loss of water.$A$. Cyclopropanol forms a cyclopropyl carbocation,which is highly unstable due to ring strain.$B$. Cyclopropylmethanol forms a cyclopropylmethyl carbocation,which can rearrange to a more stable allyl carbocation.$C$. Allyl alcohol forms an allyl carbocation $(CH_2=CH-CH_2^+)$,which is resonance-stabilized.$D$. Benzyl alcohol forms a benzyl carbocation $(C_6H_5CH_2^+)$,which is highly stabilized by resonance with the benzene ring.Comparing the stability of the carbocations,the benzyl carbocation is the most stable due to extensive resonance stabilization with the aromatic ring. Therefore,benzyl alcohol reacts the fastest with $HI$.

Which of the following alcohols shows the fastest reaction with $HI$?

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