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.
Note:
Examples are photorearrangements of @A00224@ (other than cis-@C01092@ @P04622-2@), of cyclohex-2-enones, of endoperoxides, of thioarenes, the @D01745@ and others.
Source:
PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 398 (https://doi.org/10.1351/pac200779030293)