The C₃-benzenes are a class of organic

aromatic compound Aromatic compounds or arenes are organic compounds "with a chemistry typified by benzene" and "cyclically conjugated." The word "aromatic" originates from the past grouping of molecules based on odor, before their general chemical properties were ...

s which contain a

benzene ring Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar hexagonal ring with one hydrogen atom attached to each. Because it contains only carbon and hydr ...

and three other carbon atoms. For the

hydrocarbons In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and hydrophobic; their odor is usually faint, and may b ...

with no further unsaturation, there are four isomers. The chemical formula for all the saturated isomers is C₉H₁₂. There are three

trimethylbenzenes The trimethylbenzenes constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with three methyl groups (–CH3) as a substituent. Through their different arrangement, they form three structural iso ...

, three ethylmetylbenzenes, and two propylbenzene isomers. 1980s American gasoline contained about 3-4% C₃-benzenes. Image:1,2,3-trimethylbenzene 200.svg, 1,2,3-trimethylbenzene or

Hemellitene 1,2,3-Trimethylbenzene is an organic compound with the chemical formula CH(CH). Classified as an aromatic hydrocarbon, it is a flammable colorless liquid. It is nearly insoluble in water but soluble in organic solvents. The compound occurs na ...

Image:1,2,4-Trimethylbenzene.svg, 1,2,4-Trimethylbenzene or Pseudocumene Image:Mesitylen.svg, 1,3,5-Trimethylbenzene or

Mesitylene Mesitylene or 1,3,5-trimethylbenzene is a derivative of benzene with three methyl substituents positioned symmetrically around the ring. The other two isomeric trimethylbenzenes are 1,2,4-trimethylbenzene (pseudocumene) and 1,2,3-trimethylbenze ...

Image:1,2-Ethylmethylbenzol Structural Formulae V.2.svg, 1,2-Ethylmethylbenzene Image:1,3-Ethylmethylbenzol Structural Formulae V.2.svg, 1,3-Ethylmethylbenzene Image:1,4-Ethylmethylbenzol Structural Formulae V.2.svg, 1,4-Ethylmethylbenzene Image:Cumol.svg,

Cumene Cumene (isopropylbenzene) is an organic compound that contains a benzene ring with an isopropyl substituent. It is a constituent of crude oil and refined fuels. It is a flammable colorless liquid that has a boiling point of 152 °C. Near ...

Image:Isocumene.svg, ''n''-Propylbenzene Image:Trans-Propenylbenzene.svg, ''trans''-Propenylbenzene Image:4-vinyltoluene.svg,

4-Vinyltoluene 4-Vinyltoluene is an organic compound with the formula CH3C6H4CH=CH2. It is derivative of styrene and is used as a comonomer in the production of specialized polystyrenes. It is produced by the dehydrogenation of 4-ethyltoluene. It is also some ...

Trimethylbenzenes The trimethylbenzenes constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with three methyl groups (–CH3) as a substituent. Through their different arrangement, they form three structural iso ...

* Pseudocumene *

Other

Saturated

1,2-Ethylmethylbenzene Onekama ( ) is a village in Manistee County in the U.S. state of Michigan. The population was 399 at the 2020 census. The village is located on the northeast shore of Portage Lake and is surrounded by Onekama Township. The town's name is deriv ...

* 1,3-Ethylmethylbenzene *

1,4-Ethylmethylbenzene 4-Ethyltoluene is an organic compound with the formula CH3C6H4C2H5. It is one of three isomers of ethyltoluene, the other two isomers being 3-ethyltoluene and 2-ethyltoluene. All are colorless liquids and all are used for the production of specia ...

* ''n''-Propylbenzene

Unsaturated

* ''trans''-Propenylbenzene *

References

{{Hydrocarbons Alkylbenzenes Benzene derivatives