EFFECT OF BETA-CYCLODEXTRIN COMPLEXATION ON THE PHOTOCHEMISTRY OF ALPHA-PHENOXYACETOPHENONE

The photochemistry of alpha-phenoxyacetophenone complexed with beta-cy clodextrin was investigated in the solid state and in aqueous solution . A comparison was made with the irradiation of alpha-phenoxyacetophen one in different organic solvents, The main observations were as follo ws: (1) the photolysis of solid alpha-phenoxyacetaphenone-beta-cyclode xtrin complexes preferentially yields recombination products, whereas in aqueous solution these complexes give rise to hydrogen abstraction products; (2) the photolysis of alpha-phenoxyacetophenone in solvents of increasing hydrogen donor ability leads to an increase in the forma tion of products derived from intermolecular hydrogen abstraction.