Title: branch unit
Long Title: IUPAC Gold Book - branch unit
DOI: 10.1351/goldbook.B00729
Status: current

Definition
A constitutional unit containing a branch point.

Note
A branch unit from which \(f\) linear chains emanate may be termed an f-functional branch unit, e.g. five-functional branch unit. Alternatively, the terms trifunctional, tetrafunctional, pentafunctional, etc. may be used, e.g. pentafunctional branch unit.

Related Terms
- branch point: https://goldbook.iupac.org//terms/view/B00728
- constitutional unit: https://goldbook.iupac.org//terms/view/C01288

Source
- PAC, 1996, 68, 2287. 'Glossary of basic terms in polymer science (IUPAC Recommendations 1996)' on page 2297 (https://doi.org/10.1351/pac199668122287)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/B00729/html
- json: https://goldbook.iupac.org/terms/view/B00729/json
- xml: https://goldbook.iupac.org/terms/view/B00729/xml

Citation: Citation: 'branch unit' 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.B00729
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Accessed: 2026-04-18T14:57:58+00:00