Which of the following alcohols undergoes deh | vedclass

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(C) The dehydration of alcohols with concentrated $H_2SO_4$ proceeds via the formation of a carbocation intermediate.Substituents that donate electron

Vedclass · Accepted Answer

$p-CH_3OC_6H_4CH(OH)CH_3$

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(C) The dehydration of alcohols with concentrated $H_2SO_4$ proceeds via the formation of a carbocation intermediate.Substituents that donate electron density to the carbocation center stabilize it,thereby increasing the rate of dehydration.The $-OCH_3$ group is a strong electron-donating group due to its $+M$ (mesomeric) effect,which significantly stabilizes the resulting carbocation.In contrast,$-NO_2$ and $-Cl$ are electron-withdrawing groups that destabilize the carbocation.Therefore,$p-CH_3OC_6H_4CH(OH)CH_3$ undergoes dehydration most easily.

Which of the following alcohols undergoes dehydration most easily with concentrated $H_2SO_4$?

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