Reactions of the negative oxygen ion (O−·) with carbonyl compounds
Abstract
Reactions of O−· ions with some aliphatic carbonyl compounds have been studied using ion cyclotron resonance spectrometry. With ketones, major products are OH–, (M—H)–, (M—H2)−· and (M—R)– ions; at higher pressures, OH– ions react further to yield (M—H)– ions. Limiting low and high pressure behaviour is used to derive relative rate constants for these reactions. Deuterium-labelling experiments suggest that the (M—H2)−· ion is formed by abstraction of a hydrogen atom and a proton exclusively from positions α to the carbonyl function. A brief study was also made of reactions with acetaldehyde and methyl acetate.