isomerism is a process in which molecular formula is same but structural formulae of molecules are different.

1. ISOMERISM

2. DEFINITION
Two or more compounds having the
same molecular formula but different
structural formulas and properties are
said to be isomers and the phenomenon
is called isomerism.

3. As the number of carbon atoms in a
hydrocarbon increases, the number
of possible isomers increase very
rapidly.
IMPORTANT NOTE

4. TYPES OF ISOMERISM
1) Structural Isomerism
2) Cis-trans Isomerism or Geometric Isomerism

5. STRUCTURAL ISOMERISM
DEFINITION
The structural isomerism arises due to the difference in the arrangement of atoms
within the molecule. The structural isomerism can be exhibited in five different ways.
CH3 –CH2 –CH2 –CH2 –CH3
n-pentane
CH3 –CH2 –CH –CH3
CH3
iso-pentane
CH3 – C–CH3
CH3
neo-pentane
CH3

6. TYPES OF STRUCTURAL ISOMERISM
5. Tautomerism
4. Metamerism
1. The Chain Isomerism.
2. Position Isomerism.
3. Functional Group Isomerism.

7. THANKS