Figure 1.-Mass spectrum of l-chloro-2, 3, 3-trifluorocyclopropene (4).(2), 1, 2-dichloro-3, 3- difluorocyclopropene (3), and 1, 2-dibromo-3, 3-difluorocyclopropene (8), respectively. Since the fluorination of 1 and 7 by antimony trifluoride effects halogen exchange at the allylic position only without affecting the vinylic halogens, we decided to investigate the samc reaction using a nucleophilic fluorinating reagent. With potassium fluoride in ...
