C4-Benzenes
The C4-benzenes are a class of organic aromatic compounds which contain a benzene ring and four other carbon atoms. There are three tetramethylbenzenes, six dimethylethylbenzenes, three diethylbenzenes, three isopropylmethylbenzenes, three n-propylmethylbenzenes and four butylbenzenes. The saturated compounds have formula C10H14 and molecular weight 134.22 g/mol. C4-benzenes are found in petroleum. Petrol (gasoline) can contain 5-8% C4-benzenes.
- 1,2,3,4-Tetramethylbenzene or Prehnitene
 - 1,3,4,5-Tetramethylbenzene or Isodurene
 - 1,2,4,5-Tetramethylbenzene or Durene
 - 1,2-Diethylbenzene
 - 1,3-Diethylbenzene
 - 1,4-Diethylbenzene