Reaction Kinetics of Ground State Fluorine, F(²P), Atoms. I. Measurement of Fluorine Atom Concentrations and the Rates of Reactions F + CHF₃ and F + Cl₂ using Mass Spectrometry

Reactions of F( 2 P) atoms generated by a 2.45 GHz discharge in dilute F 2 + He mixtures have been studied mass spectrometrically with a beam inlet system from a fast flow reactor. F atom concentrations have been measured from the consumption of Cl 2 in the simple and extremely rapid bimolecular reaction 1[Formula: see text]k 1 was determined to be (1.1 ± 0.3) × 10 −10 cm 3 molecule −1 s −1 at 300 °K.Rate measurements for the reaction 2, which forms CF 3 radicals, are reported, over the range 301 to 667 °K,[Formula: see text][Formula: see text]A less detailed survey of the rates at 298 °K of a series of reactions of F with H 2 , CH 4 , CH 3 Cl, CH 2 Cl 2 , and CHCl 3 , is also given; in these cases, the source of F was a discharge in CF 4 + Ar, and [F] was measured by titration with ClNO.