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Question
The relative rate of acid catalyzed dehydration of following alcohols would be:
The relative rate of acid catalyzed dehydration of following alcohols would be:
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Solution
The correct option is A III > I > IV > II
Rate of acid catalyzed dehydration is directly proportional to the stability of carbocation.
The carbocations generated from the given compounds are:
(iii) will be dehydrated at the fastest rate as the carbocation is 3∘ and stabilised by the phenyl group.
(ii) will be dehydrated at the slowest rate as the carbocation is 2∘.
Between (i) and (iv), (i) has a faster rate because after an H shift, the resulting carbocation is more stable.
Rate of acid catalyzed dehydration is directly proportional to the stability of carbocation.
The carbocations generated from the given compounds are:
(iii) will be dehydrated at the fastest rate as the carbocation is 3∘ and stabilised by the phenyl group.
(ii) will be dehydrated at the slowest rate as the carbocation is 2∘.
Between (i) and (iv), (i) has a faster rate because after an H shift, the resulting carbocation is more stable.
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