Irradiation of ethyl 3-oxo-2, 4-diphenylbutanoate in hexane gave the products formed by recombination of the radicals (Ph–\ dotCH 2 and/or Ph–\ dotCH–CO 2 Et) resulting from decarbonylation, together with small amounts of 1, 2-diphenylethanol and ethyl α- hydroxyphenylacetate, whereas in benzene no 1, 2-diphenylethanol was found. Under oxygen an increased amount of ethyl α-hydroxyphenylacetate and no radical ...