Kinetics and products of chlorine atom initiated oxidation of HCF2OCF2OCF2CF2OCF2H and HCF2O(CF2O)n-(CF2CF2O)mCF2H

✍ Scribed by T. J. Wallington; M. D. Hurley; M. S. Javadi; O. J. Nielsen

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 332 KB
• Volume: 40
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20349

✦ Synopsis

Abstract

Smog chamber/FTIR techniques were used to measure k(Cl + HCF~2~OCF~2~OCF~2~‐CF~2~OCF~2~H) = k(Cl + HCF~2~O(CF~2~O)~n~(CF~2~CF~2~O)~m~CF~2~H) = (5.0 ± 1.4) × 10^−17^ cm^3^ molecule^−1^ s^−1^ in 700 Torr of N~2~/O~2~ diluent at 296 ± 1 K. The Cl‐initiated atmospheric oxidation of HCF~2~OCF~2~OCF~2~CF~2~OCF~2~H and the sample of HCF~2~O(CF~2~O)~n~(CF~2~CF~2~O)~m~CF~2~H used in this work gave COF~2~ in molar yields of (476 ± 36)% and (859 ± 63)%, respectively, with no other observable carbon containing products (i.e., essentially complete conversion of both hydrofluoropolyethers into COF~2~). The results are discussed with respect to the atmospheric chemistry and environmental impact of hydrofluoropolyethers of the general formula HCF~2~O(CF~2~O)~n~(CF~2~CF~2~O)~m~CF~2~H. © 2008 Wiley Periodicals, Inc. Int J Chem Kinet 40: 819–825, 2008