enantiomern.

Brit.

/ᵻˈnantɪə(ʊ)mə/,

/ɛˈnantɪə(ʊ)mə/, U.S.

/əˈnæntioʊmər/,

/ɛˈnæntioʊmər/

Origin: A borrowing from Greek, combined with another borrowing from Greek. Etymons: Greek έναντιος, Greek μέρος.

Etymology: < ancient Greek έναντιος opposite (see enantiosis n.) + μέρος part, share (see mero- comb. form¹).

Chemistry.

Each of a pair of molecules that are non-superimposable mirror images of each other.The typical cause of enantiomerism is the presence in a molecule of a carbon atom with four different substituents. These substituents can be arranged in configurations which are mirror images but cannot be superimposed (cf. chiral adj.). A pair of enantiomers may be distinguished by the fact that they rotate the plane of polarized light in opposite directions (cf. optical isomer n. at optical adj. and n. Compounds). They have otherwise identical physical properties but behave differently when interacting with other chiral molecules.

ΚΠ

1917 Sci. Progress 11 551 The pale yellow form [of Phthalylphenylhydrazide] is less readily obtained quite free from its enantiomer.

1937 Discovery July 199/1 The optically active dextro and laevo forms (sometimes called enantiomers).

1959 D. J. Cram & G. S. Hammond Org. Chem. vi. 127 Pairs of molecules that are nonsuperimposable and are the mirror images of each other are called enantiomers or enantiomorphs.

1991 N.Y. Times 13 Aug. c8/4 Dr. Jerrold Meinwald of Cornell University and his associates have devised chemical methods for separating the enantiomer pairs in three common anesthetics, halothane, enflurane and isoflurane.

2001 J. Clayden et al. Org. Chem. xlv. 1220 When it comes to drug molecules, making the right enantiomer can be a matter of life or death.

This is a new entry (OED Third Edition, June 2011; most recently modified version published online March 2022).

单词	enantiomer
释义	enantiomern. Brit. /ᵻˈnantɪə(ʊ)mə/, /ɛˈnantɪə(ʊ)mə/, U.S. /əˈnæntioʊmər/, /ɛˈnæntioʊmər/ Origin: A borrowing from Greek, combined with another borrowing from Greek. Etymons: Greek έναντιος, Greek μέρος. Etymology: < ancient Greek έναντιος opposite (see enantiosis n.) + μέρος part, share (see mero- comb. form¹). Chemistry. Each of a pair of molecules that are non-superimposable mirror images of each other.The typical cause of enantiomerism is the presence in a molecule of a carbon atom with four different substituents. These substituents can be arranged in configurations which are mirror images but cannot be superimposed (cf. chiral adj.). A pair of enantiomers may be distinguished by the fact that they rotate the plane of polarized light in opposite directions (cf. optical isomer n. at optical adj. and n. Compounds). They have otherwise identical physical properties but behave differently when interacting with other chiral molecules. ΚΠ 1917 Sci. Progress 11 551 The pale yellow form [of Phthalylphenylhydrazide] is less readily obtained quite free from its enantiomer. 1937 Discovery July 199/1 The optically active dextro and laevo forms (sometimes called enantiomers). 1959 D. J. Cram & G. S. Hammond Org. Chem. vi. 127 Pairs of molecules that are nonsuperimposable and are the mirror images of each other are called enantiomers or enantiomorphs. 1991 N.Y. Times 13 Aug. c8/4 Dr. Jerrold Meinwald of Cornell University and his associates have devised chemical methods for separating the enantiomer pairs in three common anesthetics, halothane, enflurane and isoflurane. 2001 J. Clayden et al. Org. Chem. xlv. 1220 When it comes to drug molecules, making the right enantiomer can be a matter of life or death. This is a new entry (OED Third Edition, June 2011; most recently modified version published online March 2022). < n.1917
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