C3-Benzenes
# C3-Benzenes

The $C_3-benzenes$ are a class of organic aromatic compounds which contain a benzene ring and three other carbon atoms. For the hydrocarbons with no further unsaturation, there are four isomers. The chemical formula for all the saturated isomers is $C_9H_{12}.$

There are three trimethylbenzenes, three ethylmetylbenzenes, and two propylbenzene isomers. Petrol (gasoline) can contain 3-4% $C_3-benzenes.$

* 1,2,3-trimethylbenzene or Hemellitene
* 1,2,4-Trimethylbenzene or Pseudocumene
* 1,3,5-Trimethylbenzene or Mesitylene
* 1,2-Ethylmethylbenzene
* 1,3-Ethylmethylbenzene
* 1,4-Ethylmethylbenzene
* Cumene
* n-Propylbenzene
* trans-Propenylbenzene
* 4-Vinyltoluene

## Trimethylbenzenes

* Hemellitene
* Pseudocumene
* Mesitylene

## Other

### Saturated

* 1,2-Ethylmethylbenzene
* 1,3-Ethylmethylbenzene
* 1,4-Ethylmethylbenzene
* Cumene
* n-Propylbenzene

### Unsaturated

* trans-Propenylbenzene
* 4-Vinyltoluene
