The state and radiation-chemical transformations of hydroxyacetone in aqueous solutions

The state and radiation-chemical transformations of hydroxyacetone were exa mined. By UV and H-1 NMR spectroscopy data, it was found that the carbonyl form and its hydrate account for 96-98 and 2-4%, respectively, of hydroxyac etone in an aqueous solution. The following radiolysis products were identi fied by chromatography-mass spectrometry: acetaldehyde, acetone, 2-oxopropa nal, acetic acid, 2,5-hexanedione, cis-3-hexene-2,5-dione, and 1,2-propaned iol. The reaction of hydroxyacetone with hydrated electrons resulted in ace tone and 2,5-hexanedione. With the use of the scavenging technique, the rat e constant of the reaction between hydrated electrons and hydroxyacetone mo lecules was found to be equal to (3.9 +/- 0.7)x 10(9) l mol(-1) s(-1).