The energy profile diagram for the dehydratio | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

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

Vedclass · Accepted Answer

$cis-2-$butene

Vedclass · Answer

(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:

Similar Questions

What are the products obtained from the hydroboration-oxidation of propene and its hydration in the presence of dilute sulfuric acid,respectively?

What is the major product expected from the following reaction?

Which reaction will occur at the fastest rate?

$Propanal$ and $pentan-3-one$ are ozonolysis products of:

The compound formed by passing ethylene gas into a cold alkaline solution of $KMnO_4$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module