Title: stereodescriptor
Long Title: IUPAC Gold Book - stereodescriptor
DOI: 10.1351/goldbook.S05976
Status: current

Definition
A prefix to specify configuration (absolute or relative) or conformation. For example R, S; r, s; P, M; Re, Si; E, Z; ap, sp; etc.

Related Terms
- <i>E</i>, <i>Z</i>: https://goldbook.iupac.org/terms/view/E01882
- <i>P</i>, <i>M</i>: https://goldbook.iupac.org/terms/view/H02763
- <i>R</i>, <i>S</i>: https://goldbook.iupac.org/terms/view/R05423
- <i>Re</i>, <i>Si</i>: https://goldbook.iupac.org/terms/view/R05308
- <i>ap</i>, <i>sp</i>: https://goldbook.iupac.org/terms/view/A00410
- <i>r</i>, <i>s</i>: https://goldbook.iupac.org/terms/view/R05424
- configuration: https://goldbook.iupac.org/terms/view/C01249
- conformation: https://goldbook.iupac.org/terms/view/C01258

Source
- PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2218 (https://doi.org/10.1351/pac199668122193)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S05976/html
- json: https://goldbook.iupac.org/terms/view/S05976/json
- xml: https://goldbook.iupac.org/terms/view/S05976/xml

Citation: Citation: 'stereodescriptor' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.S05976
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-05-10T01:50:25+00:00