Benzene(苯) and aromatic compounds(芳香化合物) Fig 12.8 (a) the double bonds of benzene, C6H6, are able to migrate around the ring. (b) for this reason, they are often represented by a circle within the ringBenzene (苯) and aromatic compounds (芳香化合物) Fig 12.8 (a) the double bonds of benzene, C6H6, are able to migrate around the ring. (b) for this reason, they are often represented by a circle within the ring (a) (b)