Rate constants for the reaction of ozone with n -butyl, s -butyl and t -butyl methyl sulfides

The rate constants for the ozone reactions with n -butyl methyl sulfide ( n -BMS, CH 3 CH 2 CH 2 CH 2 SCH 3 ), sec -butyl methyl sulfide ( s -BMS, CH 3 CH 2 (CH 3 )CHSCH 3 ) and tert-butyl methyl sulfide ( t -BMS, (CH 3 ) 3 CSCH 3 ) were measured using our smog chamber under supposedly pseudo-first-order conditions at 300±2 K and 760 Torr. The experimental determined rate constants for n -butyl, s -butyl and t -butyl methyl sulfide are (1.23 ± 0.06)×10 −19 , (5.08 ± 0.19)×10 −20 and (2.26 ± 0.14)×10 −20 cm 3 ·molecule −1 ·s −1 , respectively. The reactivity-structure relationship of the reactions was discussed and used to illustrate the mechanism of the ozone reaction with thioethers. The results enrich the kinetics data of atmospheric chemistry.