Title: nor-
Long Title: IUPAC Gold Book - nor-
DOI: 10.1351/goldbook.N04210
Status: current

Definition
Affix used to denote the elimination of one methylene group from a side chain of a parent structure (including a methyl group).

Related Terms
- elimination: https://goldbook.iupac.org/terms/view/E02038
- methylene: https://goldbook.iupac.org/terms/view/M03881
- side chain: https://goldbook.iupac.org/terms/view/B00720

Source
- Blue Book, p. 497 (https://www.acdlabs.com/iupac/nomenclature/)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/N04210/html
- json: https://goldbook.iupac.org/terms/view/N04210/json
- xml: https://goldbook.iupac.org/terms/view/N04210/xml

Citation: Citation: 'nor-' 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.N04210
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
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: 2026-06-29T13:22:58+00:00