Recoil 18F chemistry. XI. High pressure investigation of 1,1‐difluoroethane

Nuclear recoil 18F reactions in CH3CHF2 have been investigated throughout the effective pressure range 0.3–190 atm. The principal reaction channel is F‐to‐HF abstraction for which the combined yield from quasithermal and energetic processes in the presence of 5 mole% H2S additive is 83.4%±0.2%. A reaction mechanism is proposed that involves the organic product forming channels F‐for‐F, F‐for‐αH, F‐for‐βH, F‐for‐ĊH3 and F‐for‐ĊHF2. The results are compared with those reported for the 18F+CH3CF3 system.