Rate constants for reactions of O({sup 1}D) with partially fluorinated ethers, E143A (CH{sub 3}OCF{sub 3}), E134 (CHF{sub 2}OCHF{sub 2}), and E125 (CHF{sub 2}OCF{sub 3})
- Purdue Univ., West Lafayette, IN (United States)
The rate constants for the reaction of O({sup 1}D) with CH{sub 3}OCF{sub 3} (E143a), CHF{sub 2}OCHF{sub 2} (E134), and CHF{sub 2}OCF{sub 3} (E125) have been measured at 298 K using the relative rate method relative to CH{sub 4}, CH{sub 3}F, and CH{sub 2}F{sub 2}. The results are discussed with respect to previous literature data. For E143a, E134, and E125 the 298 K rate constants have been determined to be (1.0 {+-} 0.3) {times} 10{sup {minus}10}, (2.4 {+-} 0.7) {times} 10{sup {minus}11} and (1.5 {+-} 0.6) {times} 10{sup {minus}11}cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, respectively. The authors find that reaction with O({sup 1}D) may be a significant loss mechanism for E125 and E134 in the atmosphere.
- OSTI ID:
- 677952
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Vol. 103, Issue 26; Other Information: PBD: 1 Jul 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rate constants for the reactions of OH radicals with CH{sub 3}OCF{sub 2}CHF{sub 2}, CHF{sub 2}OCH{sub 2}CF{sub 2}CHF{sub 2}, CHF{sub 2}OCH{sub 2}CF{sub 2}CF{sub 3}, and CF{sub 3}CH{sub 2}OCF{sub 2}CHF{sub 2} over the temperature range 250--430 K
Atmospheric degradation of CF{sub 3}OCF=CF{sub 2}: Kinetics and mechanism of its reaction with OH radicals and Cl atoms