Shock Wave Study of the Thermal Dissociations of C3F6 and c-C3F6. II. Dissociation of Hexafluorocyclopropane and Dimerization of CF2
The thermal dissociation of c-C3F6 has been studied in shock waves over the range 620–1030 K monitoring the UV absorption of CF2. The reaction was studied close to its high-pressure limit, but some high-temperature falloff was accounted for. Quantum-chemical and kinetic modeling rationalized the exp...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/5220 |
| Acceso en línea: | http://hdl.handle.net/11336/5220 |
| Access Level: | acceso abierto |
| Palabra clave: | Unimolecular Reactions Dissociations Reaction Dimerization Reactions Fluorocarbons https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| Sumario: | The thermal dissociation of c-C3F6 has been studied in shock waves over the range 620–1030 K monitoring the UV absorption of CF2. The reaction was studied close to its high-pressure limit, but some high-temperature falloff was accounted for. Quantum-chemical and kinetic modeling rationalized the experimental data. The reaction is suggested to involve the 1,3 biradical CF2CF2CF2 intermediate. CF2 formed by the dissociation of c-C3F6 dimerizes to C2F4. The measured rate of this reaction is also found to correspond to the falloff range. Rate constants for 2CF2 → C2F4 as a function of temperature and bath gas concentration [Ar] are given and shown to be consistent with literature values for the high-pressure rate constants from experiments at lower temperatures and dissociation rate constants obtained in the falloff range at higher temperatures. The onset of falloff at intermediate temperatures is analyzed. |
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