The Photoreactivity and Photoproduct Distribution of Conjugated Trienes

Factors affecting the photoreactivity and distribution of photoproducts in conjugated trienes

Abstract

Asurvey is given of various factors and conditions that affect thephotoreactivity and photoproduct distribution of conjugated trienes, such asground-state rotameric equilibrium, non-planarity of the chromophore,wavelength of irradiation, solvent and temperature. The effect of changes inground-state conformation and geometry, caused by substitution or variation ofsolvent or temperature, usually appears to be more important and more easilypredictable than excited state effects.