Document Detail


Atmospheric chemistry of the Z and E isomers of CF3CF=CHF; kinetics, mechanisms, and products of gas-phase reactions with Cl atoms, OH radicals, and O3.
MedLine Citation:
PMID:  17850124     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Smog chamber/FTIR techniques were used to study the atmospheric chemistry of the Z and E isomers of CF3CF=CHF, which we refer to as CF3CF=CHF(Z) and CF3CF=CHF(E). The rate constants k(Cl + CF3CF=CHF(Z)) = (4.36 +/- 0.48) x 10-11, k(OH + CF3CF=CHF(Z)) = (1.22 +/- 0.14) x 10-12, and k(O3 + CF3CF=CHF(Z)) = (1.45 +/- 0.15) x 10-21 cm3 molecule-1 s-1 were determined for the Z isomer of CF3CF=CHF in 700 Torr air diluent at 296 +/- 2 K. The rate constants k(Cl + CF3CF=CHF(E)) = (5.00 +/- 0.56) x 10-11, k(OH + CF3CF=CHF(E)) = (2.15 +/- 0.23) x 10-12, and k(O3 + CF3CF=CHF(E)) = (1.98 +/- 0.15) x 10-20 cm3 molecule-1 s-1 were determined for the E isomer of CF3CF=CHF in 700 Torr air diluent at 296 +/- 2 K. Both the Cl-atom and OH-radical-initiated atmospheric oxidation of CF3CF=CHF give CF3C(O)F and HC(O)F in molar yields indistinguishable from 100% for both the Z and E isomer. CF3CF=CHF(Z) has an atmospheric lifetime of approximately 18 days and a global warming potential (100 year time horizon) of approximately 6. CF3CF=CHF(E) has an atmospheric lifetime of approximately 10 days and a global warming potential (100 year time horizon) of approximately 3. CF3CF=CHF has a negligible global warming potential and will not make any significant contribution to radiative forcing of climate change.
Authors:
M D Hurley; J C Ball; T J Wallington
Related Documents :
10679034 - Bannayan-riley-ruvalcaba syndrome: spectrum of intestinal pathology including juvenile ...
9399764 - Octreotide inhibition of flushing and colonic motor dysfunction in carcinoid syndrome.
17850124 - Atmospheric chemistry of the z and e isomers of cf3cf=chf; kinetics, mechanisms, and pr...
23438794 - Terminal deletion 2q37.3 in a patient with klippel-trenaunay-weber syndrome.
19717864 - Papillon-lefevre syndrome with liver abscess.
2343004 - Structural hair abnormalities in ectodermal dysplasia.
Publication Detail:
Type:  Journal Article     Date:  2007-09-13
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  111     ISSN:  1089-5639     ISO Abbreviation:  J Phys Chem A     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-09-27     Completed Date:  2007-11-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9789-95     Citation Subset:  -    
Affiliation:
Systems Analytics & Environmental Sciences Department, Ford Motor Company, Mail Drop SRL-3083, Dearborn, Michigan 48121-2053, USA. mhurley3@ford.com
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  All-electron first principles calculations of the ground and some low-lying excited states of BaI.
Next Document:  Novel class of quinone-bearing polyamines as multi-target-directed ligands to combat Alzheimer's dis...