{"term":{"id":"07460","title":"photorearrangement","longtitle":"IUPAC Gold Book - photorearrangement","doi":"10.1351\/goldbook.PT07460","code":"PT07460","status":"current","definitions":[{"id":1,"text":"Photoisomerization involving changes in the arrangement of the atoms within the molecular species. It may lead to unstable isomers that react further by, e.g., dehydrogenation, deprotonation, or other reactions.","notes":{"1":"Examples are photorearrangements of alkenes (other than cis-trans photoisomerization), of cyclohex-2-enones, of endoperoxides, of thioarenes, the di-π-methane rearrangement and others."},"links":[{"term":"alkenes","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/A00224"},{"term":"di-π-methane rearrangement","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/D01745"},{"term":"photoisomerization","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/P04622"},{"term":"trans","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01092"},{"term":"unstable","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/U06569"}],"sources":["PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 398 (https:\/\/doi.org\/10.1351\/pac200779030293)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/PT07460\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/PT07460\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/PT07460\/plain"},"citation":"Citation: 'photorearrangement' 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.PT07460","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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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.","accessed":"2026-05-18T08:36:41+00:00"}}