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Mechanism of Photo-Oxidation of Heptafluorobutyric Anhydride in the Presence of NO2. Synthesis and Characterization of Heptafluoropropyl Peroxynitrate, CF3CF2CF2OONO2

Mechanism of Photo-Oxidation of Heptafluorobutyric Anhydride in the Presence of NO2. Synthesis and Characterization of Heptafluoropropyl Peroxynitrate, CF3CF2CF2OONO2

Adriana G Bossolasco, Fabio E Malanca, Maxi A Burgos Paci, Gustavo A Argüello

J Phys Chem A. 2012 Oct 11;116(40):9904-10.

PMID: 22958134

Abstract:

The photolysis of heptafluorobutyric anhydride at 254 nm in the presence of NO(2) and O(2) has been studied. It leads to the formation of CF(3)CF(2)CF(2)OONO(2), CF(3)CF(2)OONO(2), and CF(2)O as the only fluorine-containing carbonaceous products. The formation of the new heptafluoropropyl peroxynitrate (HFPN, CF(3)CF(2)CF(2)OONO(2)), as one of the main products, is a consequence of the formation of CF(3)CF(2)CF(2)OO(•) radicals followed by the reaction with NO(2). To characterize HFPN, the UV absorption cross sections and their temperature dependence between 245 and 300 K have been measured over the wavelength range 200-300 nm as well as the infrared absorption cross sections. Kinetic parameters for its thermal decomposition are also presented in the temperature range between 281 and 300 K. The Rice-Ramsperger-Kassel-Marcus calculation reveals that the rate coefficient for the thermal decomposition at 285 K is almost independent of total pressure. The mechanism for the decomposition of CF(3)CF(2)CF(2)OONO(2) in the presence of NO was adjusted by a kinetic model, which enabled the calculation of important rate coefficients.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP336594	Heptafluorobutyric anhydride		336-59-4	Price

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