Constitutional Isomerism

-Divided into 3 types: chain, positional and functional group isomerism.

Chain Isomers	Positional Isomers	Functional Group Isomers
Differ in number of longest carbon	Differ in position of functional group	Differ in type of class
Differ in physical properties Similar in chemical properties	Differ in physical properties Similar in chemical properties	Differ in both physical and chemical properties

Functional Group Isomers

Chain Isomers

Positional Isomers