The reaction of 1,3-butadiene with 1 equivale | vedclass

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

Question

(B) The reaction of $1,3$-butadiene with $1$ equivalent of $HBr$ is an electrophilic addition reaction.At low temperature $(-80^{\circ}C)$,the reactio

Vedclass · Accepted Answer

Position isomers

Vedclass · Answer

(B) The reaction of $1,3$-butadiene with $1$ equivalent of $HBr$ is an electrophilic addition reaction.At low temperature $(-80^{\circ}C)$,the reaction is under kinetic control,favoring the formation of the $1,2$-addition product,which is $3$-bromo-but-$1$-ene $(B)$.At higher temperature $(25^{\circ}C)$,the reaction is under thermodynamic control,favoring the formation of the more stable $1,4$-addition product,which is $1$-bromo-but-$2$-ene $(A)$.In $3$-bromo-but-$1$-ene,the bromine atom is at the $3$-position,while in $1$-bromo-but-$2$-ene,the bromine atom is at the $1$-position.Since the position of the functional group (bromine) changes relative to the carbon chain,$A$ and $B$ are position isomers.

Similar Questions

The product $(P)$ is:

In the following sequence of reactions,the alkene affords the compound $B$.
$CH_3-CH=CH-CH_3$ $\xrightarrow{O_3} A$ $\xrightarrow[Zn]{H_2O} B$
The compound $B$ is:

The reaction of isobutene with $HBr$ yields:

Which among the following alkenes is most stable?

Vedclass Test Series

Exam Paper Generator

Online Exam Module