Rate constants for the reaction of OH radicals with CCS and CS, have been determined at 296 K using the flash photolysis resonance fh~orescen~ technique. The values derived from this study are kOH +mS = (5.66 \* 1.21) X lo-l4 cm3 mokcuk-' s-l a& \_+OH + CS2 = (1 .I35 2 0.34) X lOmu cm3 molecu!e-' s-
Reaction of OH radicals with CS2
โ Scribed by V.P. Bulatov; S.G. Cheskis; A.A. Iogansen; P.V. Kulakov; O.M. Sarkisov; E. Hassinen
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 351 KB
- Volume
- 153
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The title reaction was studied by the direct time-resolved laser-induced lluorescence method at room temperature. The rate constants for the forward and reverse reactions were measured to be (1.92 0.5) x lo-" cm3 molecule-' s-l and (7.4&2.5)x IO4 s-', respectively. The rate constant forthe reaction of&OH adduct with ozone was found to be (0.9kO.3) x IO-"cm' moleculec' 5~'. ' Deceased.
๐ SIMILAR VOLUMES
Rate constants for the reaction of OH radicals vlith COS. CSz and CII~SCHJ, which are invo!ved in the glohal sulfur cycle, iI;IVC been determined over the temperature range 299-430 K uGng a flash ps hotolysis-resonance fluorcsccnu: tcchmque. For COS and CS2 upper limits at room tcmyzraturc of k(COS)
Replacement of N 2 by CO in H 2 + 02 + N 2 mixtures undergoing slow reaction at 500ยฐC causes a marked increase in the reaction rate and a decrease in the induction period, expressed as the time to half maximum rate. A detailed interpretation using a computer treatment gives k24/klo 1/2 = 0.42 ยฑ 0.03
A steady-state system involvmg phato~s~ of HONO asa source of OH was used to ~~e5trgate the reaction of OH wtth CS2 at 1 atm and 295 Ii. In the presence of 02 (240 Torr) a rapid reaction of OH with CSz occurs giving OCS. At lower Oz concentrafionq 0C.S formation ceases. fn au the overall rate consta
The kinetics of the gas phase reaction of OH radicals with dimethyl sulfide (CH,SCH,) have been studied a t various temperatures and total pressures using two relative rate methods and a flash photolysis technique. For the relative rate methods, rate constants were measured at 296 L 2 K as a functio
Absolute rate constants for the reaction OH + SO2 + N2 have been determined in the gas phase, at 297 K, in the pressure range SO-760 Torr. OH radicals were grnerated by flash photolysis of NzO/Hz mixtures and were monitored by time-resolved resonance absorption. The second-order rate constant $I was