The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan -1-ol are respectively ?

Engineering

Chemistry

Chemical Reactions of Alcohols

Chemical reactions of ether

Question

The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan -1-ol are respectively ?

A

1-methylcyclohexence and but - 1-ene

B

2-methylcyclohexence and but - 2-ene

C

2-methylcyclohexence and butane

D

1-methylcyclohexence and but -2-ene.

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Dehydration reaction of an alcohol can be represented as:

{CH}_{3} {CH}_{2} {CH}_{2} {CH}_{2} OH \underset{Δ}{\overset{H^{+}}{⟶}} \underset{But - 1 - ene}{{CH}_{3} {CH}_{2} CH = {CH}_{2}}

Primary alcohol undergo dehydration via E2 mechanism and secondary and tertiary alcohol undergo dehydration by E1 mechanism via most stable carbocation formation through rearrangement.

For 2-methylcyclohexanol the dehydration product is 1-methylcyclohex-1-ene or 1-methylcyclohexene

and For Butan-1-ol the dehydration product is But-1-ene.

E1 mechanism in 2° and 3° alcohol rearrangement occurs

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