photochemical reaction

Synonym: photoreaction
Generally used to describe a chemical reaction caused by absorption of @UT07492@, @VT07496@ or @IT07399@ radiation. There are many ground-state reactions, which have photochemical counterparts. Among these are photochemical nitrogen extrusions, photocycloadditions, photodecarbonylations, photodecarboxylations, photoenolizations, @P04614@, photoisomerizations, photooxidations, photorearrangements, photoreductions, photosubstitutions, etc.
Photochemical paths offer the advantage over thermal methods of forming thermodynamically disfavoured products, overcome large @A00093@ barriers in a short period of time, and allow reactivity otherwise inaccessible by thermal methods.
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 386 [Terms] [Paper]