The rate constants for the reactions F + H2S and F + D2S at 298 K were determined by a competitive method using the reaction F + CH4 as a reference reaction. The ratios of rate constants kF + H2S/kF + CH4 and kF + D2S/kF + CH4 were determined by a discharge-flow-mass spectrometric technique. By combining the values for these ratios with the value for kF + CH4 at 298 K, the values kF + H2S = (1.46 ± 0.12) × 10-10 cm3 molecule-1 s-1 and kF + D2S = (1.42 ± 0.12) × 10-10 cm3 molecule-1 s-1 were obtained. The kinetic isotope effect kF + H2S/kF + D2S was determined directly and the value 1.04 ± 0.02 was obtained. The results of this study are compared with previous literature data.
|Number of pages||5|
|Journal||Chemical Physics Letters|
|State||Published - 1998|