The C2benzenes are a class of organic aromatic compounds which contain a benzene ring and two other carbon atoms. For the hydrocarbons with no further unsaturation, there are four isomers. There are three xylenes and one ethylbenzene. The substances are:
Xylenes o-Xylene (1,2-Dimethylbenzene) m-Xylene (1,3-Dimethylbenzene) p-Xylene (1,4-Dimethylbenzene)
Other
Saturated Ethylbenzene (not a true xylene but present in mixtures called "mixed xylenes")
Unsaturated Styrene Phenylacetylene
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