What is the reactive intermediate in the...

What is the reactive intermediate in the reaction of 1,3-butadiene with HBr which results in 1,2- and 1,4- addition?

A

allylic radical

B

Dienophile

C

An allylic carbócation

D

A cyclic bromonium ion

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The correct Answer is:

C

The reaction of a diene with HBr proceeds by protonation of the diene to form an allylic o carbocation.

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