During the dehydration of alcohols to alkenes | vedclass

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Question

(A) The dehydration of alcohols to alkenes in the presence of concentrated $H_2SO_4$ follows an $E1$ mechanism.Step $1$: The initiation step involves

Vedclass · Accepted Answer

Protonation of alcohol molecule

Vedclass · Answer

(A) The dehydration of alcohols to alkenes in the presence of concentrated $H_2SO_4$ follows an $E1$ mechanism.Step $1$: The initiation step involves the protonation of the alcohol molecule by the acid catalyst $(H_2SO_4)$ to form a protonated alcohol (alkyloxonium ion).$CH_3CH_2OH + H^+ \rightarrow CH_3CH_2OH_2^+$This step makes the $-OH$ group a better leaving group (as $H_2O$).Therefore,the correct initiation step is the protonation of the alcohol molecule.

During the dehydration of alcohols to alkenes by heating with conc. $H_2SO_4$,the initiation step is:

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