When but-3-en-2-ol reacts with aqueous HBr,th | vedclass

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

Question

(C) The reaction of $but-3-en-2-ol$ with $HBr$ proceeds via the formation of a resonance-stabilized carbocation.$1$. Protonation of the hydroxyl group

Vedclass · Accepted Answer

$A$ mixture of both $a$ and $b$

Vedclass · Answer

(C) The reaction of $but-3-en-2-ol$ with $HBr$ proceeds via the formation of a resonance-stabilized carbocation.$1$. Protonation of the hydroxyl group followed by the loss of water generates the allylic carbocation: $CH_2=CH-CH^+-CH_3 \leftrightarrow ^+CH_2-CH=CH-CH_3$.$2$. The bromide ion $(Br^-)$ can attack either of the electrophilic carbons in the resonance hybrid.$3$. Attack at the $C-2$ position yields $3-bromobut-1-ene$.$4$. Attack at the $C-4$ position yields $1-bromobut-2-ene$.$5$. Thus,a mixture of both products is formed.

Column-$I$	Column-$II$
$A$. $S_N1$ reaction	$1$. vic-dibromides
$B$. Chemicals in fire extinguisher	$2$. gem-dihalides
$C$. Bromination of alkenes	$3$. Racemisation
$D$. Alkylidene halides	$4$. Saytzeff rule
$E$. Elimination of $HX$ from alkyl halide	$5$. Chlorobromocarbons

When $but-3-en-2-ol$ reacts with aqueous $HBr$,the product formed is:

Similar Questions

Reaction of $o$-toluic acid with $Br_2/Fe$ gives:

Product $(A)$ in this sequence is:

The number of all types of isomers of chlorobutane $(C_4H_9Cl)$ is:

Predict the major product of the reaction:

Vedclass Test Series

Exam Paper Generator

Online Exam Module