Title: trans-
Long Title: IUPAC Gold Book - <i>trans-</i>
DOI: 10.1351/goldbook.T06433
Status: current

Definition
A prefix designating two groups directly across a central atom from each other, i.e. in the polar positions on a sphere, not now generally recommended for precise nomenclature purposes.

Related Term
- central atom: https://goldbook.iupac.org/terms/view/C00930

Source
- Red Book, 3rd ed., p. 245

Other Outputs
- html: https://goldbook.iupac.org/terms/view/T06433/html
- json: https://goldbook.iupac.org/terms/view/T06433/json
- xml: https://goldbook.iupac.org/terms/view/T06433/xml

Citation: Citation: '<i>trans-</i>' 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.T06433
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Accessed: 2026-06-28T05:01:42+00:00