Title: identity period
Long Title: IUPAC Gold Book - identity period
DOI: 10.1351/goldbook.I00954
Status: current

Definition
The shortest distance along the chain axis for translational repetition of the chain structure. The chain identity period is usually denoted by \(c\). Synonymous with (chain) repeating distance.

Source
- Purple Book, 1st ed., p. 77 (http://old.iupac.org/publications/books/author/metanomski.html)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/I00954/html
- json: https://goldbook.iupac.org/terms/view/I00954/json
- xml: https://goldbook.iupac.org/terms/view/I00954/xml

Citation: Citation: 'identity period' 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.I00954
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Accessed: 2026-05-07T23:21:58+00:00