Abstract
The radiolysis of acetylacetone was studied at 295 and 413 K (boiling point) using 3 MeV electron beam. The degradation yield of acetylacetone increases from 0.57 (295 K) to 0.90 (413 K) μmol J−1. Boiling promotes the decay of hydrogen bonds and easier structural relaxation of heavy intermediates, which favors the redistribution of H atoms and a decrease in the probability of C–OH bond cleavages. Acetic acid and acetone are the main fragmentation products. However, the light fragmentation products represent only about 1/3 of the total mass of the final products. The main heavier products are 4-oxopent-2-en-2-yl acetate (0.073 μmol J−1) at 295 K and 4-hydroxy-2-pentanone (0.235 μmol J−1) at 413 K. Boiling conditions favor the variety of isomeric forms of radical combination products. In particular, the dimerization products of acetonyl are hexa-2,4-diene-2,5-diol and hexane-2,5-dione.
Published Version
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