Molecules which exist in two nonsuperimposable mirror images, analogous to human hands Chiral molecules are perfect physical and chemical models of each other with the exception of their rotation of polarized light and those interactions that involve other chiral systems, such as chiral molecular recognition A racemic mixture contains equal amounts of two enantiomers and thus produces no rotation of the plane of polarization of light
Compounds with the same molecular formula as the API, which differ in the spatial arrangement of atoms within the molecule and are non-superimposable mirror images