Predict the product for the following reaction.

Question

Quizplus · Accepted Answer

The given reaction is a substitution reaction between 1,3-butadiene and HBr. As HBr is a strong acid, it will undergo a protonation reaction first, with the addition of the proton to one of the double bonds of the 1,3-butadiene molecule. This will result in the formation of a resonance-stabilized carbocation intermediate. As the formation of more stable carbocations is favored, the positive charge will be present on the more substituted carbon atom, resulting in the formation of 2-bromo-1-butene as the major product. Therefore, Option B) II is the correct answer. The other options are not formed due to steric hindrance or unfavorable reaction conditions.

Predict the Product for the Following Reaction