422-65-1Relevant academic research and scientific papers
The Thermal Gas-Phase Reaction of NO2 with 1,1-Dichlorodifluoroethane, CF2CCl2 in the Presence of O2
Czarnowski, Joanna
, p. 49 - 62 (2007/10/02)
The gas-phase reaction of NO2 with CF3CCl2 in the presence of O2 has been studied at 257.3 and 300.2 K./ The initial pressure of NO2 was varied between 0.7 and 4.7 torr, that of CF3CCl2 between 18.4 and 81.9 torr and that of O2 between 50.4 and 696.3 torr.Several experiments were made in the presence of N2 varying its pressure between 135 and 394 torr.Seven products were formed: COF2, COCl2, CF2ClC(O)Cl, , O2NCF2C(O)Cl, CF2ClCCl2NO2 and CF2ClCCL2O2NO2.The reaction was a homogeneous chain reaction, whose rate and distribution of the products depended on the relation between NO2, CF2CCl2 and O2 and also on the total presure.The following mechanism, where E = CF2CCl2, R' = O2NCF2CCl2, R'' = CF2C;CCl2, R = R' or R'' and M = effective pressure, explains the experimental results 1.) NO2 + E = R', 2.) R' + O2 + M = R'O2 + M 3.) 2 R'O2 = 2 R'O + O2, 4.) R'O = O2NCF2C(O)Cl + Cl, 5.) Cl + E = R'' 6.) R'' + NO2 + M = R''NO2 + M, 7.) R'' + O2 + M = R''O2 + M, 8.) R''O2 + NO2 + M = R''O2NO2 + M, 9.) R''O2NO2 = R''O2 + NO2, 10.) 2 R''O2 = 2 R''O + O2, 11.) R''O = CF2ClC(O)Cl + Cl, 12.) RO2 + E = RO2(E), 13.) RO2(E) = RO + ,14.) RO2(E) + O2 + M = RO2(E)O2 + M, 15.) 2 RO2(E)O2 = 2 RO2(E)O + O2, 16.) RO2(E)O = RO + COF2 + CLCl2. At room temperature the value of 1.3 +/- 0.2*10-4 S-1 was obtained for K9.
