Benzene on reaction with chloropropane give cumene.

Benzene react with chloride in the presence of ferric chloride to form chlorobenzene.

In industry, chloroform is produced by heating a mixture of chlorine or methane. At 400–500 °C, a free radical halogenation occurs, converting these precursors to progressively more chlorinated compounds:

CH₄ + Cl₂ → CH₃Cl + HCl

CH₃Cl + Cl₂ → CH₂Cl₂ + HCl

CH₂Cl₂ + Cl₂ → CHCl₃ + HCl

Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas, carbonyl chloride known as phosgene.

When ethyl iodide react with sodium in dry ether, it gives butane. This reaction is known as Wurtz reaction.