Question

How is propene is converted into $1-bromopropane$ and $2-bromopropane$?

Answer 1

The addition of hydrogen halide to an unsymmetrical alkene gives two products. Propene on reaction with hydrogen bromide forms 80 % 2- bromopropane (isopropyl bromide) and 20% 1-bromopropane(n-propyl bromide)

Propene when reacted with HBr in presence of peroxide, it gives 1,-Bromopropane. The addition is according to Anti Markovnikovs rule.

Addition of HBr to propene gives 2- bromopropane. The hydrogen of HBr adds to Carbon 1 of propene and bromine adds to Carbon 2