08325 IUPAC Gold Book - correlation time 10.1351/goldbook.08325 08325 current 1 Parameter related to the mean time during which a molecule maintains its spatial geometry. For an internuclear vector, correlation time is approximately equal to the average time for it to rotate through an angle of one radian. PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 684 (https://doi.org/10.1515/pac-2019-0203) https://goldbook.iupac.org/terms/view/08325/html https://goldbook.iupac.org/terms/view/08325/json https://goldbook.iupac.org/terms/view/08325/plain Citation: 'correlation time' 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.08325 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-08-05T01:35:32+00:00