Absolute rate coefficients for F + H2 and F + D2 at <i>T</i> =295 Ka)

Abstract

The rate coefficients for the F+H2 and F+D2 reactions were determined to be (1.8±0.3) ×1013 and (9.5±1.7) ×1012 cm−3/mol-s, respectively. The absolute values and the resultant ratio of H-atom to D-atom abstraction of 1.92±0.19 are in agreement with earlier determinations. Fluorine atoms were generated under isothermal conditions in excess argon by means of the infrared multiphoton dissociation of SF6. The reaction between F and H2(D2) was monitored by means of the time-resolved infrared emission from HF+(DF+). The validity of the experimental method is discussed.