Illustrated Glossary of Organic Chemistry
Enantiomeric excess (ee): The
excess of one enantiomer
over the other in a mixture of enantiomers.
Expressed mathematically: enantiomeric
excess = % of major enantiomer
- % of minor enantiomer.
Example: A mixture composed of 86% R enantiomer
and 14% S enantiomer
has 86% - 14% = 72% ee.
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