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(B) The rate of dehydration of alcohols depends on the stability of the carbocation intermediate formed after the loss of water. $(i)$ forms a carboca

Vedclass · Accepted Answer

$(i) > (ii) > (iii)$

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(B) The rate of dehydration of alcohols depends on the stability of the carbocation intermediate formed after the loss of water. $(i)$ forms a carbocation that is resonance-stabilized by the adjacent double bond and the benzene ring. $(ii)$ forms a secondary benzylic carbocation,which is stabilized by the benzene ring. $(iii)$ forms a vinylic carbocation,which is highly unstable. Comparing the stability: $(i)$ (allylic and benzylic resonance) > $(ii)$ (benzylic) > $(iii)$ (vinylic). Therefore,the rate of dehydration follows the order $(i) > (ii) > (iii)$.

Compare the rate of dehydration of $(i)$,$(ii)$ and $(iii)$ by conc. $H_2SO_4$.

Similar Questions

$X$ and $Y$ respectively are

What is the correct order of reactivity of the following alcohols towards $H-X$?
$(I) \; CH_2 = CH - OH$
$(II) \; CH_2 = CH - CH_2OH$
$(III) \; CH_3 - CH_2 - OH$
$(IV) \; CH_3 - CH(OH) - CH_3$

Distinction between primary,secondary and tertiary alcohol is done by

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Which of the following nucleophiles is the most reactive?

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