Photochemistry of perfluoroacetyl fluoride -: Kinetics of the reaction between CF3 and FCO radicals

被引：7

作者：

Bierbrauer, KL ^{[1
]}

Chiappero, MS ^{[1
]}

Malanca, FE ^{[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 | 1999年 / 122卷 / 02期

关键词：

D O I：

10.1016/S1010-6030(98)00431-6

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：

The photolysis at 254 nm of perfluoroacetyl fluoride (CF3COF) in the gas phase yields C2F6, CF2O and CO as products. An excess of O-2 added to the system leads to the formation of CF2O and CO2 as main products. If, instead of O-2, c-C6H12 were added, the main products are CF3H and HC(O)F In both cases a faster rate of CF3COF dissapearance is observed. The measurement of the quantum yield for CF3COF consumption as well as for products formation are: for CF3COF alone, phi(CF3COF) = 2 phi(C2F6) = 2 phi(CF20) = 0.43 +/- 0.05; in the presence of c-C6H12 phi(CF3COF) = phi(CF3H) = 1.02 +/- 0.02 and in the presence of O-2, phi(CF3COF) = 1.02 +/- 0.05 The low quantum yield observed for pure CF3COF suggests the occurence of the recombination reaction: CF3 + FCO --> CF3COF for which we calculated the rate constant as (6.9 +/- 0.8) x 10(-12) cm(3) molecule(-1) s(-1). (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：73 / 78

页数：6

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