title: C3-Benzenes
text: # 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
  