What is the reactive intermediate in the reaction of 1,3-butadiene with HBr which results in1,2- and 1,4- addition?

What is the reactive intermediate in the reaction of 1,3-butadiene wit

1.	What is the reactive intermediate in the reaction of 1,3-butadiene with HBr which results in1,2- and 1,4- addition?
Answer» allylic radical Dienophile An allylic carbócation A cyclic bromonium ion Solution :The reaction of a diene with HBr PROCEEDS by PROTONATION of the diene to form an allylic o CARBOCATION.