Illustrated Glossary of Organic Chemistry

Monosubstituted: A molecule or functional group in which only one hydrogen has been replaced by another atom or group. These substituents are not limited to methyl groups as shown here. When considering alkene stability, only carbon substituents matter (i.e., -CH3 or -Ph matter but -Br or -OCH3 do not).







Benzene
 No substituents
  
Toluene
A monosubstituted benzene
 One substituent 		 
1,2-Dimethylbenzene
A disubstituted benzene
 Two substituents 		 
1,2,3-Trimethylbenzene
A trisubstituted benzene
 Three substituents 		 
1,2,3,4-Tetramethylbenzene
A tetrasubstituted benzene
 Four substituents


















Ethylene
 No substituents
Propene
A monosubstituted alkene
 One substituent
Z-2-Butene
A disubstituted alkene
 Two substituents
2-Methyl-2-butene
A trisubstituted alkene
 Three substituents
2,3-Dimethyl-2-butene
A tetrasubstituted alkene
 Four substituents