Photochemistry of perfluoroacyl halides in the presence of O2 and CO

被引：7

作者：

Malanca, FE ^{[1
]}

Paci, MB ^{[1
]}

Argüello, GA ^{[1
]}

机构：

[1] Univ Nacl Cordoba, Fac Ciencias Quim, INFIQC, Dept Fisicoquim, RA-5000 Cordoba, Argentina

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2002年 / 150卷 / 1-3期

关键词：

photochemistry; perfluoroacyl halide; photolysis;

D O I：

10.1016/S1010-6030(02)00089-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photolyses of CF3C(O)X and C2F5C(O)X (X = Cl, F) at 254 nm in the presence Of O-2 yield the perfluorinated radicals C2F5O (C-2) and CF3O (C-1), respectively. The C-2 radicals decompose to give CF3 radicals: C2F5O --> CF3 + CF2O which, in turn, react with O-2 leading to the formation of C-1 radicals. When in addition to O-2, CO is present, the C-1 radicals react with it leading to its catalytic oxidation to CO2. The trioxide CF3OC(O)O3C(O)OCF3 was observed following the photolysis of all four halides in the presence Of O-2 and CO. The other radical partners coming from the initial step in the photolysis (XC(O)) as well as the products of their reaction with O-2 (XC(O)O-y, y = 1, 2) do not react with CO but when X = F they lead to the formation of a new stable peroxy molecule with the formula CF3OC(0)O2C(O)F. Some of the properties of this new molecule, its stability and its IR features are presented in this work. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 6

页数：6

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