Term: trapping https://doi.org/10.1351/goldbook.T06492 Definition: The interception of a reactive molecule or reaction intermediate so that it is removed from the system or converted into a more stable form for study or identification. Related Terms: 1) scavenger (http://doi.org/10.1351/goldbook.S05495). 2) reactive (http://doi.org/10.1351/goldbook.R05180). 3) intermediate (http://doi.org/10.1351/goldbook.I03096). 4) stable (http://doi.org/10.1351/goldbook.S05900). Source: PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1174 (https://doi.org/10.1351/pac199466051077) Citation: 'trapping' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.T06492 License: 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. 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.