Chapter 17, Problem 17.68P

Interpretation Introduction

Interpretation: An explanation corresponding to the given statement that triphenylene resembles to benzene in that it does not undergo addition reaction with ${\text{Br}}_{\text{2}}$, but phenanthrene reacts with ${\text{Br}}_{\text{2}}$ to yield the addition product is to be stated.

Concept introduction: The delocalization of bond, lone pair, or free electrons from one place to another is known as resonance. The stability of compound depends upon the number of resonating structures. More the resonating structures of compound more will its stability.