The energy profile diagram for the dehydratio | vedclass

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Question

(B) The dehydration of $2-$butanol proceeds via the formation of a secondary carbocation. Elimination of a proton from the carbocation can lead to thr

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$cis-2-$butene

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(B) The dehydration of $2-$butanol proceeds via the formation of a secondary carbocation. Elimination of a proton from the carbocation can lead to three different alkenes: $1-$butene,$cis-2-$butene,and $trans-2-$butene. According to the energy profile diagram,the activation energy for the formation of the products follows the order: $E_a(a) > E_a(b) > E_a(c)$. Since the stability of the alkenes follows the order: $trans-2-$butene > $cis-2-$butene > $1-$butene,the product with the lowest activation energy corresponds to the most stable alkene,which is $trans-2-$butene (product $c$). The product with the highest activation energy corresponds to the least stable alkene,which is $1-$butene (product $a$). Therefore,product $(b)$ corresponds to the intermediate stability alkene,which is $cis-2-$butene.

The energy profile diagram for the dehydration of $2-$butanol using concentrated $H_2SO_4$ is given below. The product $(b)$ of the above reaction is:

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