Stereoisomerism

-Compounds which have the same molecular formula and structural formula but differ in arrangement of atoms in space.
-Divided into two types: cis-trans isomerism and optical isomers(enantiomers)

Cis-Trans Isomerism	Optical Isomerism
Arises due to restricted arrangement of carbon-carbon double bond and carbon-carbon single bond in cyclic compounds	Carbon molecules with at least one chirality centre(carbon attached to 4 different atoms or groups of atoms)
Has different atoms or groups of atoms at the same C=C bond or C-C bond in cyclic compounds	Optically active, exist as enantiomers and not superimposable
Have same chemical properties but different physical properties	Able to rotate plane polarised light in a polarimeter