Title: fusion name
Long Title: IUPAC Gold Book - fusion name
DOI: 10.1351/goldbook.F02564
Status: current

Definition
A composite name for a polycyclic parent structure having the maximum number of non-cumulative double bonds and at least one ortho fusion. Name formation involves the dissection of the structure into contiguous components having recognized trivial or semisystematic names, one of which is selected as the 'base component'. attachment of the other components is described by prefixes.

Related Terms
- attachment: https://goldbook.iupac.org/terms/view/A00512
- composite: https://goldbook.iupac.org/terms/view/CT07545
- cumulative double bonds: https://goldbook.iupac.org/terms/view/C01437

Source
- Blue Book Guide, p. 14 (https://doi.org/10.1351/pac199971071327)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/F02564/html
- json: https://goldbook.iupac.org/terms/view/F02564/json
- xml: https://goldbook.iupac.org/terms/view/F02564/xml

Citation: Citation: 'fusion name' 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.F02564
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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: 2026-06-28T09:47:13+00:00