Bisketenes OC CH (CH2) n CH CO (1b, c, d, n= 4, 3, 6) and (E)-OC CHCH CHCH CO (E-13) were generated in solution by dehydrochlorination of bis (acyl chlorides) and by photochemical Wolff rearrangements and identified by their characteristic IR signals. The bisketenes react with aminoxyl radicals to give tetraaddition products for 1b and conjugate 1, 6-diaddition for E-13.
