A SACM/CT study of the CF2(OH)CF2OO + NO2 -> CF2(OH)CF2OONO2 and CF3CF2OO + NO2 CF3CF2OONO2 recombination reactions and their reverse unimolecular decomposition process was performed. The electronic energy along the reaction pathways was calculated at the G4(MP2) level. High-pressure rate coefficients of 1.53 x 10(-12) (T/300)(0.37) cm(3) molecule (-1) s(-1) and 1.79 x 10(16) (T/300)(0.40) exp (-24.4 kcal mo(-1)/RT) s(-1) were derived at 200-300 K for the direct and backward reactions of CF2(OH) CF2OONO2, while for CF3CF2OONO2, the expressions 1.01 x 10(-12)(T/300)(0.39) cm(3) molecule(-1) s(-1) and 1.05 x 10(16)(T/300)(0.44) exp(-23.0 kcal mot(-1)/RT) s(-1) were obtained. A decomposition lifetime profile was derived for CF2(OH)CF2OONO2, indicating that it could act as transport and reservoir of CF2(OH) CF2OO and NO2 in the stratosphere. (C) 2017 Elsevier.B.V. All rights reserved.