Uses of haloarenes

Haloarenes or aryl halides are named by adding the prefix 'halo' (fluoro, chloro, bromo, iodo) before the name of the aromatic hydrocarbon. In case of di-substituted compounds, the relative positions of the substituents 1,2; 1,3 and 1,4 are indicated by the prefixes ortho (o-), meta (m-) and para (p-) respectively. For example,