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The addition of HBr to but-1-ene in the ...

The addition of HBr to but-1-ene in the presence of dibenzoyl peroxide yields

A

`(+-)-2-`bromobutane

B

`1-`bromobutane

C

`(+-) 1-`bromobutane

D

`2-`bromobutane

Text Solution

Verified by Experts

The correct Answer is:
B
When alkenes are treated with `HBr` in the presence of peroxides, the addition occurs in an anti-Markovnikov's manner in the sense that the `H` atom because attached to the `C` atom with fewer `H` atoms:
`CH_(3)CH_(2)CH=CH_(2)+HBr overset((C_(6)H_(5)CO)_(2)O_(2))to CH_(3)CH_(2)CH_(2)CH_(2)Br`
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