1986, Vol.59, No.7

2247-2254

The ion/molecule reactions in acetone were investigated which were induced by the electron impact. It was found that the protonated acetone reacts with an acetone molecule to produce the protonated diacetone alcohol (4-hydroxy-4-methyl-2-pentanone) and the protonated mesityl oxide (4-methyl-3-penten-2-one) through the aldol condensation reaction. It was also found that the acetone molecule isomerizes from keto to enol form in the interaction with the chloride ion. The thermochemical data for the higher-order clustering reactions of the proton and chloride ion with acetone molecules were obtained.