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11. Organic Chemistry eLearn.Punjab
(a) Homocyclic or Carbocyclic compounds.
Homocyclic or carbocyclic compounds contain rings which are made up of only one kind
of atoms, i.e., carbon atoms. These are further divided into two classes:
• Aromatic compounds
• Alicyclic compounds
Aromatic compounds:
These organic compounds contain at least one benzene ring in their molecule. A benzene
ring is made up of six carbon atoms with three alternating double bonds. They are called
aromatic because of aroma or smell they have. For example:
They are also called benzenoid compounds.
Alicyclic or non-benzenoid compounds:
Carbocyclic compounds which do not have benzene ring in their molecules are called
alicyclic or non-benzenoid compounds. For example,
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