Chapter 22, Problem 22.48P

Interpretation Introduction

Interpretation:

When anthracene is treated with ${\text{Br}}_{\text{2}}$ in ${\text{CCl}}_{\text{4}}$, why the addition of ${\text{Br}}_{\text{2}}$ takes place is to be explained.

Concept introduction:

The $\text{π}$ system of aromatic compound is relatively electron rich, in contrast, an electrophile is relatively electron poor, hence aromatic compound may undergo electrophilic addition reaction. But when benzene is treated with ${\text{Cl}}_{\text{2}}$ or $\text{HCl}$, no reaction occurs. Electrophilic addition reactions that permanently destroy benzene’s aromaticity are heavily disfavored. The electrophilic addition reaction in that does not destroy the aromaticity of an aromatic compound are favored.