JEE Main Chemistry question

What is the product of the reaction of 1,3-butadiene with ?

(A)1,4-dibromobuteneCorrect
(B)1,2-dibromobutene
(C)3,4-dibromobutene
(D)2,3-dibromo-2-butene

Answer: (A)

Solution

1,3-Butadiene, CH_2=CH-CH=CH_2, is a conjugated diene, so addition of one equivalent of can proceed either by 1,2-addition (across one double bond) or by 1,4-addition (with the allylic cation/resonance delocalisation spreading across all four carbons, placing the

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Question ID VK-148128