What is the reactive intermediate in the reaction of 1,3-butadiene with HBr resulting in 1,2-addition?

Name: What is the reactive intermediate in the reaction of 1,3-butadiene with HBr resulting in 1,2-addition?
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The reactive intermediate in the reaction of 1,3-butadiene with HBr resulting in 1,2-addition is an allylic cation. This occurs because the initial protonation of the diene leads to a resonance-stabilized allylic cation, which then reacts with bromide to give the 1,2-addition product.

What Is the Reactive Intermediate in the Reaction of 1,3-Butadiene