• Chlorobenzene and bromobenzene both exhibit two types of intermolecular forces of attraction (IMFA)
1. London Dispersion Forces (LDF): This is present in all molecules and is the main force exhibited by non- polar molecules. The benzene ring of chlorobenzene and bromobenzene exhibits this type of IMFA.
2. Dipole-dipole Forces (DDF): This is exhibited by molecules which have a net dipole caused by the presence of an electronegative atom. The halogens (Cl and Br) are responsible for this type of IMFA in the benzene derivatives.
Why is the boiling point of bromobenzene higher than that of chlorobenzene?