The kinetics and the mechanism of the thermal gas‐phase reaction between NO₂ and 1,1‐dichlorodifluoroethylene, CF₂CCl₂

Abstract

Abstract The kinetics of the gas phase reaction between NO 2 and CF 2 CCl 2 has been investigated in the temperature range from 50 to 80°C. The reaction is homogeneous. Three products are formed: O 2 NCF 2 CCl 2 NO 2 and equimolecular amounts of CINO and of O 2 NCF 2 C(O)Cl. The rate of consumption of the reactants is independent of the total pressure, the reaction products, and added inert gases and can be represented by a second‐order reaction: However, the distribution of the products is influenced by the pressure of the present gases, which favor the formation of the dinitro‐compound in a specific way. The effect of CF 2 CCl 2 is the greatest. In the absence of added gases, the ratio of O 2 NCF 2 CCl 2 NO 2 to that of O 2 NCF 2 C(O)Cl is proportional to (CF 2 CCl 2 + γ P products). The experimental results can be explaned by the following mechanism: equation image P and X represent the products and the added gases: