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Either of a pair of molecules that are mirror images but cannot be superimposed on each other, and that rotate the plane of polarized light by an equal amount in opposite directions. Also called enantiomorph, optical isomer.

[Greek enantios, opposite; see ant- in Indo-European roots + -mer, isomer.]

en·an′ti·o·mer′ic (-mĕr′ĭk) adj.


(Chemistry) chem a molecule that exhibits stereoisomerism because of the presence of one or more chiral centres


(ɪˈnæn ti ə mər)

either of a pair of optical isomers that are mirror images of each other.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.enantiomer - either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
References in periodicals archive ?
2] Bupivacaine is a racemic mixture (50:50) of its two enantiomers, Levobupivacaine, S (-) isomer and Dextrobupivacaine, R (+) isomer.
37) Enantiomers contain the same atoms and have identical physical and chemical properties, except that they rotate polarized light in opposite directions and react differently with other chiral molecules.
Warfarin has two enantiomers (R-warfarin and S-warfarin), and it is absorbed from the gastrointestinal (GI) tract at the rate of 93%.
It is our strong conviction that the possibilities of this chemistry are enormous, and the end result will be a generally useful synthetic method for the preparation of valuable building blocks as single enantiomers.
The Plavix patent was filed in 1988 at a time when the selection and isolation of enantiomers were still relatively new.
The author argues that modern stereochemistry is based on a set of terms that are not rooted in mathematical foundations and create confusion due to a misleading dichotomy between enantiomers and diastereomers; confusion of reflections with permutations; misleading concepts of stereogeneic units, chirality units, and pseudoasymmetric units; a misleading presumption of a single pair of chirality/achirality; and the misleading terms of stereoheterotopic, anatiotopic, and diastereotopic.
S enantiomers are said to have less CNS and cardiac toxicity than R enantiomers.
Chiral Technologies, a leader in enantioselective chromatography, serves pharmaceutical and other life science industries and offers a portfolio of chiral stationary phases and analytical and preparative chiral columns for the separation of racemic mixtures into single enantiomers.
30) Enantiomers of 1,1'-binaphthol are eluted at [t.
Various enantiomers of the chiral compounds show different biological activities in the living systems during the medical and pharmaceutical processes.
The resolution of racemates is the primary method to obtain pure enantiomers in industry [2-4].