• Hydrocarbons which contain one or more benzene rings.

• Benzene, C6H6, is the simplest aromatic hydrocarbon.

 

 

 

 

 

 

 

 

 

 

 

 

• Symbolic structures of some aromatic hydrocarbons are shown below;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Monosubstituted Aromatic Hydrocarbon

• Hydrocarbon in which the parent name is benzene.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Disubstituted Aromatic Hydrocarbon

• ortho- (o-), meta- (m-), or para (p-) can be used in place of positional markers when there are two substituents on the benzene ring (disubstituted benzenes). They are defined as the following:

• ortho- (o-): 1,2- (next to each other in a benzene ring)

• meta- (m): 1,3- (separated by one carbon in a benzene ring)

• para- (p): 1,4- (across from each other in a benzene ring)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Trisubstituted Aromatic Hydrocarbon

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

written by: Terry Maine Dela Pieza