Mixtures of Cl:!, CH4, and 0 2 were flash photolyzed a t room temperature and pressures of -60-760 Torr to produce CH3O2. The CH3O2 radicals decay by the second-order process (6) 2CH302products with k g = (3.7 f 0.3) X cm3/sec in good agreement with other studies. This value ignores any removal by s
The mechanism of SO2 oxidation by CH3O2 radicals. Rate coefficients for the reactions of CH3O2 with SO2 and NO
โ Scribed by R. Simonaitis; J. Heicklen
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 237 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The reacttonsof CH30z nitIt SO2 and NO haw been studied bv steady state photo&s of azomethane in the presence of Ot-SOz-SO mixtures at 196 M and I ;Ltm total pressure. Thr quantum yield of NO otidntion by CHxO= m.dicxG is increased substanthlIy when SO? is added ro the system indicating an SOa induced chain oxidation of X0. The rare isw gbes -CH30 t KOz (1). Combining this ratio with the absolute value ofkr = 8.2 X IO-" cm3 se1 gibes X-2 = 10
๐ SIMILAR VOLUMES
Methylperoxy radicals were generated by the flash photolysis of azomethane-oxygen mixtures. The observed broadband spectrum of the CH302 radical is similar, but not identical to those reported previously. The CH:302 decay followed second-order kinetics a t high CH:jOz concentrations with k4, = (2.5
The rate constant for the reaction CH302 + NO2 -(products) has been measured directly by flash photolysis and kinetic spectroscopy. At room temperature and a t total pressures between 53 and 580 Torr, k:, = (9.2 f 0.4) X lo8 liter/mole sec so that the rate of formation of the probable primary produc
Rcccivcd 30 Apnl 1982 SO:, photodissociation at 193 nm (AIF cxclmer lmr) ha been used to create SO radicals; the chcmdumincsccncc from the SO + 03 reaction has been used to follow the SO ndical decay. Rate coefticicnls at 298 K of (1 07 t 0.16) x 10-r6, (1 06 f 0 16) x 10-r3, and (1 48 k 0 20) x IO-
Rate constants for the reactions of OH radicals and Cl atoms with CH,CH,NO>, CH,CH,CH,NO,, CH3CH2CH2CHzN02, and CH,CH2CH2CH,CH2N02 have been determined at 295+3 K and a total pressure of approximately 1 atm. The OH rate data were obtained using both the absolute rate technique of pulse radiolysis co
The hinetics of the reactions of the (CI13)2K rrtduxl wthX0.N02,and O2 rrere studied usins FTIR spectroscopy. The tutwe of the products and the ratio ofr.~tc constants for these reactions acre dctermmed\_ The results were used to evalu.rte the potenti.n for nitros.unine .md nitramine formation in X0