Homologous Series of Hydrocarbons

ü  Homologous Series of Hydrocarbons:

A series f Hydrocarbons in which the successive members of the series follow a regular structural pattern and differ by a –CH₂ – group.

The compounds belonging to the same Homologous series have similar molecular formula and chemical properties.

Homologous series of alkanes	Homologous series of alkenes	Homologous series of alkynes
General Formula – CnH2n+2	CnH2n	CnH2n-2
Methane – CH4	-	-
Ethane – C2H6	Ethene – C2H4	Ethyne – C2H2
Propane – C3H8	Propene – C3H6	Propyne – C3H4
Butane – C4H10	Butene – C4H8	Butyne – C4H6
Pentane – C5H12	Pentene – C5H10	Pentyne – C5H8
Hexane – C6H14	Hexene – C6H12	Hexyne – C6H10