Chapter 16, Problem 16.69P

Interpretation Introduction

Interpretation: By considering the arrangement of orbitals in the allene reactant, the explanation corresponding to the formation of $2-\text{bromoprop}-1-\text{ene}$ rather than $3-\text{bromoprop}-1-\text{ene}$ is to be stated.

Concept introduction: A reaction of hydrogen halide with alkene results in the formation of alkyl halide. This type of reaction is an electrophilic addition of hydrogen halide.

The steps involved in electrophilic addition reaction are stated below:

• First protonation of the alkene take place to generate the carbocation.

• The halide ion will attack on the carbocation to give the final product.