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How are racemization and resolution opposite chemical processes?
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isomerism
Tetrahedral geometry of methane: (A) stick-and-ball model and (B) diagram showing bond angles and distances. (Plain bonds represent bonds in the plane of the image; wedge and dashed bonds represent those directed toward and away from the viewer, respectively.)
Racemization and resolution are inverse chemical processes concerning the state of enantiomers—molecules that are nonsuperposable mirror images of one another.12
- Racemization is the process of transforming an optically active substance into a racemic mixture, which contains equal quantities of both enantiomers. This occurs when an active substance is converted into a symmetric, inactive intermediate, which then reverts to an equal mixture of both mirror-image forms.1
- Resolution is the converse process, by which a racemic mixture is separated into its two individual, optically active constituent enantiomers.12
While racemization increases the disorder of optical activity by creating a balanced, inactive mixture, resolution restores optical activity by isolating the specific components. Methods for resolution include physical sorting of crystals or converting enantiomers into diastereoisomers, which possess different physical properties that allow for separation.12