What does racemize mean?
Racemize is a technical verb meaning to convert a compound into a racemic mixture. A racemic mixture contains equal amounts of two enantiomers: mirror-image forms that have the same ordinary chemical properties but rotate plane-polarized light in opposite directions. A racemization process therefore eliminates the optical activity associated with a single, enantiomerically enriched substance. The verb may describe a chemical change, as when a reaction intermediate loses its stable stereochemical configuration, or be used intransitively to describe a compound undergoing that change. In chemistry and pharmaceutical science, racemization can affect both the purity and biological activity of a substance, because different enantiomers may interact differently with biological systems. The term is related to racemic, racemate, and raceme, and it is usually encountered in formal scientific writing rather than everyday speech.
verbTo cause a compound or molecular structure to become racemic, especially by converting an optically active substance into an equal mixture of its enantiomers. It can also be used intransitively for a substance undergoing this process.
- To convert an optically active compound into a racemic mixture, usually through chemical reaction.
- To undergo conversion into a racemic mixture.
- To make a racemic mixture from distinct enantiomeric forms.
"The reaction conditions caused the chiral compound to racemize during purification."
"The acid treatment racemized the sample and eliminated its optical rotation."
"The catalyst allows the intermediate to racemize under mild conditions."
Racemization quietly destroys a molecule’s optical identity by turning a single-handed chiral compound into a balanced mixture of mirror-image forms.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does racemize come from?
The verb is formed from the adjective racemic and the suffix -ize. Racemic derives from raceme, a botanical term for a cluster or series of berries, and came to describe a mixture containing equal amounts of a compound’s two enantiomers. The sense involving chemical interconversion developed from that stereochemical meaning. The spelling racemise is the common British variant of racemize.
Related word forms
How racemize is actually used
This is primarily a chemistry term, especially used in stereochemistry and pharmaceutical chemistry. The spelling “racemise” is standard in British English, whereas “racemize” is standard in American English.
Easily confused with racemize
“Racemise” is the usual British spelling of the verb, while “racemize” is the standard American spelling.