Gas phase photochemistry of perfluoropropyl fluoride and perfluoropropyl chloride

被引：5

作者：

Cariati, SA ^{[1
]}

Weibel, DE ^{[1
]}

Staricco, EH ^{[1
]}

机构：

[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Quim Fis, Inst Invest Fis Quim Cordoba, RA-5000 Cordoba, Argentina

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1999年 / 123卷 / 1-3期

关键词：

photochemistry; chlorofluorocarbons; quantum yields; radical;

D O I：

10.1016/S1010-6030(99)00032-5

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 of perfluoropropyl fluoride and perfluoropropyl chloride vapour was studied in the 12.9-79.0 Torr and 6.1-40.7 Torr pressure ranges, using light of 232-240 and 254 nm, respectively. The products found were CF3CF2COF: CO, C4F10 and COF2; CF3CF2COCl: CO, CF3CF2Cl, C4F10 and Cl-2. The quantum yield for the decomposition of CF3CF2COF was 0.4 +/- 0.06, independently of the total pressure and light intensity while for CF3CF2COCl it was 1.01 +/- 0.06 at 254 nm taken as phi((C2F5Cl+2C4F10)). When the photolysis was made in the presence of hydrogenated compounds, a clear hydrogen abstraction took place in both the reactions, indicating the existence of radicalary mechanisms. No net effect of mechanisms and quantum yields were found on the length of the carbon chain with respect to the perfluoro acetyl halides. Mechanisms for the decomposition of perfluoroacyl halides are discussed. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：1 / 5

页数：5

共 20 条

[1] PHOTOLYSIS OF PERFLUOROGLUTARIC ANHYDRIDE VAPOR AT LOW-PRESSURES - EFFECT OF WAVELENGTH ON THE PRODUCT RATIO [J].