Effect of ring substitution on the photochemistry of. alpha.-(aryloxy) acetophenones

JC Netto-Ferreira, IGJ Avellar…

Index: Netto-Ferreira, J.C.; Avellar, I.G.J.; Scaiano, J.C. Journal of Organic Chemistry, 1990 , vol. 55, # 1 p. 89 - 92

Full Text: HTML

Citation Number: 56

Abstract

The photochemistry of a series of 10 a-(ary1oxy) acetophenones has been examined by quantum yield, product studies, and laser flash photolysis techniques. Triplet decay involves a competition of@-cleavage with intramolecular quenching by the@-aryl group, the latter being favored in all systems. Typical triplet lifetimes at room temperature range from 60 to 260 ps and are rather insensitive to the substitution pattern.@-Cleavage rate constants ...