The C
3-benzenes are a class of organic
aromatic compound
Aromatic compounds, also known as "mono- and polycyclic aromatic hydrocarbons", are organic compounds containing one or more aromatic rings. The parent member of aromatic compounds is benzene. The word "aromatic" originates from the past grouping ...
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 ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, ...
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, and their odors are usually weak or ex ...
with no further unsaturation, there are four isomers. The chemical formula for all the saturated isomers is C
9H
12.
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 is ...
, three ethylmetylbenzenes, and two propylbenzene isomers. Petrol (gasoline) can contain 3-4% C
3-benzenes.
Pseudocumene
1,2,4-Trimethylbenzene, also known as pseudocumene, is an organic compound with the chemical formula CH(CH). Classified as an aromatic hydrocarbon, it is a flammable colorless liquid with a strong odor. It is nearly insoluble in water but soluble ...
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
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 is ...
*
Hemellitene
*
Pseudocumene
1,2,4-Trimethylbenzene, also known as pseudocumene, is an organic compound with the chemical formula CH(CH). Classified as an aromatic hydrocarbon, it is a flammable colorless liquid with a strong odor. It is nearly insoluble in water but soluble ...
*
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 ...
Other
Saturated
*
1,2-Ethylmethylbenzene
*
1,3-Ethylmethylbenzene
*
1,4-Ethylmethylbenzene
*
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 ...
*
''n''-Propylbenzene
Unsaturated
*
''trans''-Propenylbenzene
*
4-Vinyltoluene
References
{{Hydrocarbons
Alkylbenzenes
Benzene derivatives