Abstract: A 1970 studyZ reported that enolic acetone cations (C3H60+.) undergo threshold energy dissociation by isomerization to excited acetone ions which lose the newly formed CH3 in preference (58: 42) to the original methyl in forming C2H30+. The original postulate that this arises from non-randomization of vibrational energy has in recent years been challenged repeatedly. Questions concerning alternative dissociation pathways involving ...
