Of the following alcohols,the one that would | vedclass

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(C) The reaction of alcohols with conc. $HCl$ and anhydrous $ZnCl_{2}$ is known as the Lucas test. This reaction proceeds via an $S_{N}1$ mechanism,wh

Vedclass · Accepted Answer

$2-$methylpropan$-2-$ol

Vedclass · Answer

(C) The reaction of alcohols with conc. $HCl$ and anhydrous $ZnCl_{2}$ is known as the Lucas test. This reaction proceeds via an $S_{N}1$ mechanism,where the rate-determining step is the formation of a carbocation. Therefore,the reactivity of alcohols follows the order: $3^{\circ} > 2^{\circ} > 1^{\circ}$. Among the given options: $A$. Butan$-1-$ol is a $1^{\circ}$ alcohol. $B$. Butan$-2-$ol is a $2^{\circ}$ alcohol. $C$. $2-$methylpropan$-2-$ol is a $3^{\circ}$ alcohol. $D$. $2-$methylpropan$-1-$ol is a $1^{\circ}$ alcohol. Since $3^{\circ}$ alcohols form the most stable carbocation,$2-$methylpropan$-2-$ol reacts fastest.

Of the following alcohols,the one that would react fastest with conc. $HCl$ and anhydrous $ZnCl_{2}$ is,

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