Question: (a) Suggest a structural explanation for the fact that the 1,2-addition reaction of 1,3-butadiene and hydrogen bromide occurs faster than 1,4-addition? (Consider the relative contributions

(a) Suggest a structural explanation for the fact that the 1,2-addition reaction of 1,3-butadiene and hydrogen bromide occurs faster than 1,4-addition? (Consider the relative contributions that the two forms

make to the resonance hybrid of the allylic cation.)
(b) How can you account for the fact that the 1,4-addition product is more stable?

and

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