Enantiomers | Diastereomers |
They are non superimposable mirror images of each other. | They are non superimposable and non mirror images of each other. |
If a compound has two chiral C atoms, then enantiomers differ in configuration at both chiral C atoms. | If a compound has two chiral C atoms, then diastereomers differ in configuration at only one chiral C atom. |
All enantiomers are optically active. | Few diastereomers are optically active. Few diastereomers are optically inactive. |