The title reaction was studied in real time by observing infrared fluorescence resulting from the competitive reaction F + H2.With N2 as a collision partner, the limiting rate constants were found to be k0 = 9.8+/-1.6x10-31 cm6 molecule-2 s-1 and kinfinite = 3.2+/-0.8x10-11 cm3 molecule-1 s-1, as determined by fitting the experimental data to Kassel, and modified Lindemann-Hinshelwood models.Measurements with argon showed it to be slightly less effective as stabilizing the reaction complex.Calculations indicate that both FNO2 and FONO are formed in the reaction, with a product ratio of FONO/FNO2 ca. 7.