Stereoisomerism is the arrangement of atoms in molecules whose connectivity remains the same but their arrangement in space is different in each isomer. Stereoisomerism involves compounds with the same chemical formulae and bonds but differing in spatial arrangement. It can be divided into :
- Geometrical Isomerism, which arises commonly in heteroleptic complexes. This type of isomerism arises due to the different possible geometric arrangements for the ligands.
- Optical isomerism, which arises in chiral molecules or ions are mirror images of each other. However, they cannot be superimposed on each other.