title: Kinetics and products of the gas-phase reactions of divinyl sulfoxide with OH and NO3 radicals and O3.
abstract: Using relative rate methods, rate constants for the gas-phase reactions of divinyl sulfoxide [CH 2CHS(O)CHCH 2; DVSO] with NO 3 radicals and O 3 have been measured at 296 +/- 2 K, and rate constants for the reaction with OH radicals have been measured over the temperature range of 277-349 K. Rate constants obtained for the NO 3 radical and O 3 reactions at 296 +/- 2 K were (6.1 +/- 1.4) x 10 (-16) and (4.3 +/- 1.0) x 10 (-19) cm (3) molecule (-1) s (-1), respectively. For the OH radical reaction, the temperature-dependent rate expression obtained was k = 4.17 x 10 (-12)e ((858 +/- 141)/ T ) cm (3) molecule (-1) s (-1) with a 298 K rate constant of (7.43 +/- 0.71) x 10 (-11) cm (3) molecule (-1) s (-1), where, in all cases, the errors are two standard deviations and do not include the uncertainties in the rate constants for the reference compounds. Divinyl sulfone was observed as a minor product of both the OH radical and NO 3 radical reactions at 296 +/- 2 K. Using in situ Fourier transform infrared spectroscopy, CO, CO 2, SO 2, HCHO, and divinyl sulfone were observed as products of the OH radical reaction, with molar formation yields of 35 +/- 11, 2.2 +/- 0.8, 33 +/- 4, 54 +/- 6, and 5.4 +/- 0.8%, respectively, in air. For the experimental conditions employed, aerosol formation from the OH radical-initiated reaction of DVSO in the presence of NO was minor, being approximately 1.5%. The data obtained here for DVSO are compared with literature data for the corresponding reactions of dimethyl sulfoxide.
authors: Air Pollution Research Center, University of California, Riverside, California 92521, USA.
authors: Sara M
authors: SM
authors: Aschmann
authors: Ernesto C
authors: EC
authors: Tuazon
authors: William D
authors: WD
authors: Long
authors: Roger
authors: R
authors: Atkinson
mesh_terms: D000336:Aerosols / Q000138:chemical synthesis / Q000737:chemistry / Q000528:radiation effects; D005609:Free Radicals / Q000737:chemistry / Q000528:radiation effects; D005740:Gases / Q000737:chemistry / Q000528:radiation effects; D017665:Hydroxyl Radical / Q000737:chemistry* / Q000528:radiation effects; D007700:Kinetics; D008027:Light; D009589:Nitrogen Oxides / Q000737:chemistry* / Q000528:radiation effects; D010126:Ozone / Q000737:chemistry*; D010782:Photolysis; D015203:Reproducibility of Results; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013454:Sulfoxides / Q000737:chemistry* / Q000528:radiation effects; D013696:Temperature; D014753:Vinyl Compounds / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D000336:Aerosols; D005609:Free Radicals; D005740:Gases; D009589:Nitrogen Oxides; D013454:Sulfoxides; D014753:Vinyl Compounds; C031701:nitrogen trioxide; D017665:Hydroxyl Radical; D010126:Ozone