Arrange the following reactants in increasing | vedclass

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

Question

(B) The rate of $S_{N^1}$ reaction depends on the stability of the carbocation intermediate formed after the leaving group departs.$1$. Compound $1$ i

Vedclass · Accepted Answer

$2 < 3 < 4 < 1$

Vedclass · Answer

(B) The rate of $S_{N^1}$ reaction depends on the stability of the carbocation intermediate formed after the leaving group departs.$1$. Compound $1$ is an allylic bromide. Upon loss of $Br^-$,it forms a stable allylic carbocation.$2$. Compound $2$ is a vinylic bromide. Vinylic halides are extremely unreactive towards $S_{N^1}$ because the resulting vinylic carbocation is highly unstable due to the $sp$ hybridization of the carbon atom.$3$. Compound $3$ is an allylic chloride. It forms an allylic carbocation,but $Cl^-$ is a poorer leaving group than $Br^-$,making it less reactive than $1$.$4$. Compound $4$ is an allylic bromide. It forms a secondary allylic carbocation. Comparing $1$ and $4$,$1$ forms a more substituted (more stable) allylic carbocation than $4$.Thus,the order of stability of carbocations (and reactivity) is $2 < 3 < 4 < 1$.

Arrange the following reactants in increasing order of reactivity towards $S_{N^1}$ solvolysis reaction with methanol.

Similar Questions

The possible products formed in the following reaction are:

What are $X$ and $Y$ respectively in the following reaction sequence?
$C_3H_6$ $\xrightarrow[\text{(C}_6\text{H}_5\text{CO)}_2\text{O}_2]{\text{HBr}} X$ $\xrightarrow{\text{Na/ dry ether}} Y$

In the given reaction,the products are:

Which of the following is $NOT$ obtained when a mixture of chloroethane and $1-$chloropropane is treated with sodium metal in dry ether?

The structure of the major product formed in the following reaction is

Vedclass Test Series

Exam Paper Generator

Online Exam Module