Photochemically initiated reaction of 3, 4~ dichloro~ 3, 4, 4~ trifiuoro~ 2~ butanone (l) with 2~ methyI~-butene in the liquid phase gave a mixture of isomeric oxetanes Xa, Xb (26% reI), reduction products of the starting ketone, XI and XII, and the recombination products XIVa, XIVb, XV. Irradiation of halogenoketone. I in the gaseous phase by an ultraviolet discharge tube gave a mixture of compounds IIl-VIII; their structures indicate that the Norrish ...
