Kinetic and Modeling Studies of the Reaction S + H2S

摘要: Abstract The reaction of S (3PJ) with H2S in Ar bath gas has been characterized by the laser photolysis–resonance fluorescence technique over 300–1040 K. observed second-order rate constants are found to be pressure-dependent below 700 K. modeled accurately as a combination direct abstraction on triplet surface ( 3 P J ) + H 2 → SH together multi-well reactions singlet via intersystem crossing SS ∗ HSSH M Since low energy barrier (3 kJ mol−1), spin-forbidden channels dominate at low-temperature, overall and product distribution being dependent pressure. Above 800 K, channel becomes important is dominant above 1000 K.