https://doi.org/10.1351/goldbook.P04585
Generally used to describe a chemical reaction caused by absorption of
ultraviolet
, visible
or infrared
radiation. There are many ground-state reactions, which have photochemical counterparts. Among these are photochemical nitrogen extrusions, photocycloadditions, photodecarbonylations, photodecarboxylations, photoenolizations, photo-Fries rearrangement
, photoisomerizations, photooxidations, photorearrangements, photoreductions, photosubstitutions, etc.Note:
Photochemical paths offer the advantage over thermal methods of forming thermodynamically disfavoured products, overcome large
Photochemical paths offer the advantage over thermal methods of forming thermodynamically disfavoured products, overcome large
activation
barriers in a short period of time, and allow reactivity otherwise inaccessible by thermal methods.