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(A) The reaction involves the electrophilic addition of $HBr$ to a conjugated diene,$2$-methylbuta-$1,3$-diene (isoprene). When $HBr$ is added to a co

Vedclass · Accepted Answer

The structure of $1-$bromo$-3-$methylbut$-2-$ene.

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(A) The reaction involves the electrophilic addition of $HBr$ to a conjugated diene,$2$-methylbuta-$1,3$-diene (isoprene). When $HBr$ is added to a conjugated diene,both $1,2$-addition and $1,4$-addition products can be formed. In the presence of excess $HBr$,the reaction proceeds further. However,the question asks for the major product of the initial addition step or the primary outcome of the reaction. The $1,4$-addition product is generally more stable due to the formation of a more substituted alkene. The reaction of $2$-methylbuta-$1,3$-diene with $HBr$ yields $1$-bromo-$3$-methylbut-$2$-ene as the major $1,4$-addition product.

The major product formed in the following reaction is:

Similar Questions

When $2-$butyne is treated with $H_2/$ Lindlar's catalyst,compound $X$ is produced as the major product and when treated with $Na/liq. NH_3$ it produces $Y$ as the major product. Which of the following statements is correct?

The products $Q$ and $R$ in the following reactions respectively are:
$H_2 + CH_3-C \equiv CH$ $\xrightarrow{\text{Lindlar's catalyst}} P$ $\xrightarrow[Zn + H_2O]{O_3} Q + R$

Markownikoff's rule provides guidance for the addition of $HBr$ on:

Identify the wrong statement for the following reactions:
$CH_3-CH(CH_3)-CH=CH_2 \xrightarrow{HBr} A$
$CH_3-CH(CH_3)-CH=CH_2 \xrightarrow{HBr + ROOR} B$
$CH_3-CH(CH_3)-CH=CH_2 \xrightarrow{NBS} C$

Which compound on reductive ozonolysis produces at least one mole of $CO_2$?

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