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enantiomer Line breaks: en¦antio|mer
Pronunciation: /ɪˈnantɪə(ʊ)mə/

Definition of enantiomer in English:


Each of a pair of molecules that are mirror images of each other.
Example sentences
  • Such isomers are called enantiomers and molecules that have enantiomers are said to be chiral or to show chirality.
  • As with hands, chiral molecules can occur in two different forms, called enantiomers, which are mirror-images of one another.
  • One of the principal barriers to high yield is the creation of both enantiomers of a chiral compound, when only one is desired.


Pronunciation: /ɪnantɪə(ʊ)ˈmɛrɪk/ /ɛnantɪə(ʊ)ˈmɛrɪk/
Example sentences
  • The reactions proceed at room temperature without solvent, giving enantiomeric excesses of 99.8 per cent.
  • There is no symmetry to this molecule, and it exists in the two enantiomeric forms.
  • This enantiomerically enriched catalyst could then act to promote the formation of amino acids with substantial enantiomeric excesses.
Example sentences
  • The flavour and fragrance industry takes advantage of chirality - by being able to produce enantiomerically pure compounds, manufacturers can not only expand their product ranges but also guarantee customers product uniformity.
  • The phosphine that was used was not enantiomerically pure, but even so the resulting product showed a 15 per cent enantiomeric excess.
  • Their efficiency, together with that of the now highly optimised extraction processes, mean that the plant remains unchallenged as the commercial source of enantiomerically pure morphine and codeine.


1930s: from Greek enantios 'opposite' + -mer.

Definition of enantiomer in:
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