Recoil18F chemistry. XI. High pressure investigation of 1,1hyphen;difluoroethane

摘要

Nuclear recoil18F reactions in CH3CHF2have been investigated throughout the effective pressure range 0.3ndash;190 atm. The principal reaction channel is Fhyphen;tohyphen;HF abstraction for which the combined yield from quasithermal and energetic processes in the presence of 5 molepercnt; H2S additive is 83.4percnt;plusmn;0.2percnt;. A reaction mechanism is proposed that involves the organic product forming channels Fhyphen;forhyphen;F, Fhyphen;forhyphen;agr;H, Fhyphen;forhyphen;bgr;H, Fhyphen;forhyphen;Cdot;H3and Fhyphen;forhyphen;Cdot;HF2. The results are compared with those reported for the18F+CH3CF3system.