Rate constants for the reactions OH+H2S→H2O+SH and OH+NH3 →H2O+NH2 over the temperature range 297–427 °K

Abstract

Rate constants for the reactions OH+H2S→H2O+SH (k1) and OH+NH3→H2O+NH2 (k2) were determined over the temperature range 297–427 °K by a flash photolysis–resonance fluorescence technique. The Arrhenius expressions obtained were k1= (5.2±0.5) ×10−12 cm3 molecule−1sec−1, independent of temperature (297–424 °K); k2=2.93×10−12 e−(1710±300)/RT cm3 molecule−1sec−1 with rate constants at 298 °K of k1= (5.25±0.53) ×10−12 cm3 molecule−1sec−1 and k2= (1.64±0.16) ×10−13 cm3 molecule−1sec−1. These rate constants are compared and discussed with literature values.