The biggest team of aromatic compounds are These where one or more with the hydrogens of benzene are changed by Another atom or team, as in toluene (C6H5CH3) and benzoic acid (C6H5CO2H). Polycyclic aromatic compounds are assemblies of benzene rings that share a standard side—by way of example, naphthalene (C10H8). https://titusymyjt.thezenweb.com/a-secret-weapon-for-genetic-transformation-64325457