Dear Student,
Isomers are of two types:-
a) Constitutional Isomers (Structural Isomers)
b) Stereoisomers
a) Constitutional Isomers (Structural Isomers) includes:
i. Chain Isomers
ii. Functional Isomers
iii. Position Isomers
iv. Metamers
v. Tautomers
vi. RIng Chain Isomers
b) Stereoisomers includes:
i. Configuration Isomers: 1. Geometrical Isomers
2. Optical Isomers
ii. Conformational Isomers
Regards​​
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