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ChemInform Abstract (such as Me-CH2-CHF+, Me-CH+-CH2F, and fluoretanium; higher stability for the HF-allyl cation complex than for any of these ions).

ChemInform Abstract Electron bombardment flow experiments demonstrate that CH3-C=CH2+ from electron impact on Me3CF is formed via vicinal elimination of HF from CH3-+CF-CH3. Among the C3H6F+ isomers surveyed, ab initio calculations show that there is a stable minimum for each one that corresponds to a stable isoelectronic C3H6O isomer. A range of experimental results that yield C3H5+ ions is reported.