Photochemical reactions

Definition

Photochemical reactions are chemical reactions initiated by the absorption of light energy, specifically ultraviolet or visible light, leading to the transformation of molecules. These reactions are integral in organic chemistry for creating new molecular structures with desired stereochemistry.

Related terms

Pericyclic Reactions:

A class of reactions involving the redistribution of electrons over a closed loop of participating atoms, typically facilitated by heat or light.

Electrocyclic Reactions:

A type of pericyclic reaction where a conjugated pi system forms a sigma bond resulting in ring closure or opening, depending on thermal or photochemical conditions.

Conrotatory and Disrotatory Motions: Specific types of motion associated with electrocyclic reactions; conrotatory involves simultaneous rotation in the same direction, while disrotatory involves rotation in opposite directions