Kinetics study of the gas-phase reactions of CHF2CF2OCHF2 and CF3CHFCF2OCH2CF2CF3 with OH radicals at 253-328 K

Chen L; Kutsuna S; Tokuhashi K; Sekiya A

Chemical Physics Letters, Vol.403, No.1-3, 180-184, 2005

DOI10.1016/j.cplett.2005.01.002 Export Citation

Kinetics study of the gas-phase reactions of CHF2CF2OCHF2 and CF3CHFCF2OCH2CF2CF3 with OH radicals at 253-328 K

Chen L, Kutsuna S, Tokuhashi K, Sekiya A

The rate constants, k(1) and k(2), for the reactions of CHF2CF2OCHF2 and CF3CHFCF2OCH2CF2CF3 with OH radicals were measured by means of a relative rate method as (7.58 +/- 3.30) x 10(-13) exp [-(1720 +/-130)/T] and (8.46 +/- 1.83) x 10(-13) exp [-(1460 +/- 60)/ T] cm(3) molecule(-1) s(-1), respectively, at 253-328 K. The measurements were performed in an 11.5-dm(3) reaction chamber. OH radicals were generated by UV photolysis of an O-3-H2O-He mixture at 200 Torr. The tropospheric lifetimes of CHF2CF2OCHF2 and CF(3)CHFCF(2)OCH(2)CFZCF(3) were estimated at 26.5 and 9.1 years. (C) 2005 Elsevier B.V. All rights reserved.