1. Contains O, S, N atoms other than carbon.
2. O, S, N atoms are called Heteroatoms.
3. May be Aliphatic or Aromatic.
Do not contain any benzene rings.
Contains (4n+2)π electrons
Contain one or more benzene rings
1. Benzene or derivatives of benzene.
2. Can contain more than one benzene ring.
3. Properties similar to benzene.
4. Ring contains alternating single and double bonds.
5. Contains (4n+2)π electrons [Huckel's rule]
6. Contains delocalised electrons, for which
resonance stabalization is present.
1. Do not contain Benzene structure.
2. Properties similar to aliphatic compounds.
Basic structure is formed
by only carbon atoms.
Carbon atoms connected to each
other in a ring.
aka: Aliphatic Organic Compound
Compounds having chain of carbon
atoms attached by double bonds or
triple bonds.
Ex: Alkenes, Alkynes
Compounds having chain of carbon
atoms attached by single bonds.
Ex: Alkanes
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