3,3-Dimethylbut-1-ene is treated with $HBr$ in the presence of peroxide. The major product is

A1-bromo-3,3-dimethylbutane
B2-bromo-2,3-dimethylbutane
C1-bromo-2,3-dimethylbutane
D2-bromo-3,3-dimethylbutane

Answer: A

The radical pathway puts Br on the terminal carbon and gives a secondary radical. Radicals do not undergo methyl or hydride shifts here. The product is

(CH X_{3}) X_{3} C - CH X_{2} CH X_{2} Br

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3,3-Dimethylbut-1-ene is treated with HBr in the presence of peroxide. The major product is

Answer: A

More questions on Carbocation rearrangements in addition

3,3-Dimethylbut-1-ene is treated with $HBr$ in the presence of peroxide. The major product is