Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M)
The thermal dissociation reaction CF₃ (+Ar) → CF₂ + F (+Ar) was studied in incident and reflected shock waves by monitoring UV absorption signals of the primary dissociation product CF₂. CF₃ radicals were produced by thermal decomposition of CF₃I. Accounting for secondary reactions of F atoms, rate...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2020
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/123920 |
| Aporte de: |
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I19-R120-10915-123920 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física Química thermal dissociation reaction UV absorption incident and reflected shock waves |
| spellingShingle |
Ciencias Exactas Física Química thermal dissociation reaction UV absorption incident and reflected shock waves Cobos, Carlos Jorge Knight, Gary Sölter, L. Tellbach, E. Troe, J. Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| topic_facet |
Ciencias Exactas Física Química thermal dissociation reaction UV absorption incident and reflected shock waves |
| description |
The thermal dissociation reaction CF₃ (+Ar) → CF₂ + F (+Ar) was studied in incident and reflected shock waves by monitoring UV absorption signals of the primary dissociation product CF₂. CF₃ radicals were produced by thermal decomposition of CF₃I. Accounting for secondary reactions of F atoms, rate constants for the unimolecular dissociation were derived. Experimental parts of the falloff curves were obtained over the ranges 1544 – 2106 K and 1.0 × 10⁻⁵ ≤ [Ar] ≤ 9.3 × 10⁻⁵ mol cm⁻³. Theoretical modelling allowed for a construction of the full falloff curves connecting the limiting low pressure rate constants k₀ = [Ar] 2.5 × 10¹⁸ (T/2000 K)<sup>-5.1</sup> exp (-42 450 K/T) cm³ mol⁻¹ s⁻¹ with the limiting high pressure rate constants k<sub>∞</sub> = 1.6 × 10¹⁶ (T/2000 K)<sup>-1.3</sup> exp (-43 250 K/T) s⁻¹ (center broadening factors of F<sub>cent</sub>= 0.25, 0.22, and 0.20 at 1500, 2000, and 2500 K, respectively, were used). The influence of simplifications of falloff expressions and of limiting rate constants on the representation of experimental data is discussed. |
| format |
Articulo Articulo |
| author |
Cobos, Carlos Jorge Knight, Gary Sölter, L. Tellbach, E. Troe, J. |
| author_facet |
Cobos, Carlos Jorge Knight, Gary Sölter, L. Tellbach, E. Troe, J. |
| author_sort |
Cobos, Carlos Jorge |
| title |
Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| title_short |
Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| title_full |
Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| title_fullStr |
Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| title_full_unstemmed |
Falloff Curves of the Reaction CF₃ (+M) → CF₂ + F (+M) |
| title_sort |
falloff curves of the reaction cf₃ (+m) → cf₂ + f (+m) |
| publishDate |
2020 |
| url |
http://sedici.unlp.edu.ar/handle/10915/123920 |
| work_keys_str_mv |
AT coboscarlosjorge falloffcurvesofthereactioncf3mcf2fm AT knightgary falloffcurvesofthereactioncf3mcf2fm AT solterl falloffcurvesofthereactioncf3mcf2fm AT tellbache falloffcurvesofthereactioncf3mcf2fm AT troej falloffcurvesofthereactioncf3mcf2fm |
| bdutipo_str |
Repositorios |
| _version_ |
1764820450524790787 |