Chapter 25, Problem 25.18YT

Interpretation Introduction

Interpretation:

The complete mechanism for equation 25-28 is to be determined.

Concept introduction:

If an alkene undergoes radical bromination, then substitution will most likely take place at the allylic position due to the resonance stabilization in the allylic radical that would be produced on hydrogen abstraction. In radical halogenation reactions, $\text{N-bromosuccinimide}\left(\text{NBS}\right)$ is the source of a low, steady concentration of ${\text{Br}}_{\text{2}}$.