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Rate constants for the reactions of the hydroxyl radical with CHF2CF2CF2CHF2 and CF3CHFCHFCF2CF3

✍ Scribed by Z. Zhang; R.D. Saini; M.J. Kurylo; R.E. Huie

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 383 KB
Volume: 200
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)80003-t

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✦ Synopsis

Rate constants have been measured over the temperature range 245-419 K for the gas-phase reactions of the hydmxyl radical with the hydrofluorocarbons CHF,CF,CF,CHF, and CF&HFCHFCF2CF,. The Arrhenius expressions k (CHF,CF,CFzCHF,) =(7.80i3.40)X10-'3exp[-(1.51~0.26)~103/T] and k(CF,CHFCHFCF~CF,)=(4.21+1.28)x10-'3exp[-(1.40f 0.18 ) x 1 03/T] cm3 molecule-' s-' were derived from the kinetic data. The atmospheric lifetimes of CHF&F,CF,CHF, and CF,CHFCHFCF$ZF, were estimated, relative to CQCH,, to be 14 and 17 years.

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