Question

How will you convert prop-1-ene to 1-bromopropane?

Answer 1

Prop-1-ene (CH₃ – CH = CH₂) is treated with hydrogen bromide (HBr) in the presence of organic peroxide. Due to the peroxide effect (Kharasch effect), the addition follows the anti-Markovnikov rule. As a result, bromine attaches to the terminal carbon, giving 1-bromopropane (CH₃ – CH₂ – CH₂Br).

\[\ce{\underset{prop-1-ene}{CH3 - CH = CH2} + HBr ->[peroxide][] \underset{1-bromopropane}{CH3 - CH2 - CH2 - Br}}\]