A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes
- Autores
- Cafferata, Lázaro F. R.; Jeandupeax, Rene; Romanelli, Gustavo Pablo; Mateo, Carmen Margarita; Jefford, Charles W.
- Año de publicación
- 2003
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The kinetics of the thermal decomposition reactions of artemisinine (1), a cis-fused 1,2,4-trioxane, and trans-3,3dimethyl-1,2,4-trioxane (6) in solutions of benzene, toluene, and methanol in sealed tubes were compared at temperatures between 100.1° and 171.4 °C. Pseudo first-order rate constant values were determined for conversions of both cyclic peroxides up to ca. 60%. The activation parameters and the composition of the reaction products were indicative of homolytic cleavage of their O-O bonds as the rate-determining steps followed by stepwise fragmentation. The free energies of activation (ΔG#) for 1 and 6 reactions in the aromatic solvents were calculated at the middle of each temperature range, giving values of 30.7 and 35.1 kcal/mol, respectively, which are evaluated considering their different molecular configurations. Furthermore, the rates of the thermal decomposition reactions of those trioxanes were sensitive to solvent effects.
Laboratorio de Estudio de Compuestos Orgánicos
Centro de Investigación y Desarrollo en Ciencias Aplicadas - Materia
-
Química
Cis- and trans- fused 1,2,4-trioxanes
Artemisinine
Thermolysis
Reactions kinetics
Artemisinina
Termófisis
Cinética de reacción - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/98261
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A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanesCafferata, Lázaro F. R.Jeandupeax, ReneRomanelli, Gustavo PabloMateo, Carmen MargaritaJefford, Charles W.QuímicaCis- and trans- fused 1,2,4-trioxanesArtemisinineThermolysisReactions kineticsArtemisininaTermófisisCinética de reacciónThe kinetics of the thermal decomposition reactions of artemisinine (1), a cis-fused 1,2,4-trioxane, and trans-3,3dimethyl-1,2,4-trioxane (6) in solutions of benzene, toluene, and methanol in sealed tubes were compared at temperatures between 100.1° and 171.4 °C. Pseudo first-order rate constant values were determined for conversions of both cyclic peroxides up to ca. 60%. The activation parameters and the composition of the reaction products were indicative of homolytic cleavage of their O-O bonds as the rate-determining steps followed by stepwise fragmentation. The free energies of activation (ΔG#) for 1 and 6 reactions in the aromatic solvents were calculated at the middle of each temperature range, giving values of 30.7 and 35.1 kcal/mol, respectively, which are evaluated considering their different molecular configurations. Furthermore, the rates of the thermal decomposition reactions of those trioxanes were sensitive to solvent effects.Laboratorio de Estudio de Compuestos OrgánicosCentro de Investigación y Desarrollo en Ciencias Aplicadas2003-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf206-211http://sedici.unlp.edu.ar/handle/10915/98261enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/65056info:eu-repo/semantics/altIdentifier/url/https://dialnet.unirioja.es/servlet/articulo?codigo=2642748info:eu-repo/semantics/altIdentifier/issn/0001-9704info:eu-repo/semantics/altIdentifier/hdl/11336/65056info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:16Zoai:sedici.unlp.edu.ar:10915/98261Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:17.236SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
title |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
spellingShingle |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes Cafferata, Lázaro F. R. Química Cis- and trans- fused 1,2,4-trioxanes Artemisinine Thermolysis Reactions kinetics Artemisinina Termófisis Cinética de reacción |
title_short |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
title_full |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
title_fullStr |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
title_full_unstemmed |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
title_sort |
A kinetic and mechanistic study on the thermal decomposition reactions of cis- and trans- fused 1,2,4-trioxanes |
dc.creator.none.fl_str_mv |
Cafferata, Lázaro F. R. Jeandupeax, Rene Romanelli, Gustavo Pablo Mateo, Carmen Margarita Jefford, Charles W. |
author |
Cafferata, Lázaro F. R. |
author_facet |
Cafferata, Lázaro F. R. Jeandupeax, Rene Romanelli, Gustavo Pablo Mateo, Carmen Margarita Jefford, Charles W. |
author_role |
author |
author2 |
Jeandupeax, Rene Romanelli, Gustavo Pablo Mateo, Carmen Margarita Jefford, Charles W. |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Química Cis- and trans- fused 1,2,4-trioxanes Artemisinine Thermolysis Reactions kinetics Artemisinina Termófisis Cinética de reacción |
topic |
Química Cis- and trans- fused 1,2,4-trioxanes Artemisinine Thermolysis Reactions kinetics Artemisinina Termófisis Cinética de reacción |
dc.description.none.fl_txt_mv |
The kinetics of the thermal decomposition reactions of artemisinine (1), a cis-fused 1,2,4-trioxane, and trans-3,3dimethyl-1,2,4-trioxane (6) in solutions of benzene, toluene, and methanol in sealed tubes were compared at temperatures between 100.1° and 171.4 °C. Pseudo first-order rate constant values were determined for conversions of both cyclic peroxides up to ca. 60%. The activation parameters and the composition of the reaction products were indicative of homolytic cleavage of their O-O bonds as the rate-determining steps followed by stepwise fragmentation. The free energies of activation (ΔG#) for 1 and 6 reactions in the aromatic solvents were calculated at the middle of each temperature range, giving values of 30.7 and 35.1 kcal/mol, respectively, which are evaluated considering their different molecular configurations. Furthermore, the rates of the thermal decomposition reactions of those trioxanes were sensitive to solvent effects. Laboratorio de Estudio de Compuestos Orgánicos Centro de Investigación y Desarrollo en Ciencias Aplicadas |
description |
The kinetics of the thermal decomposition reactions of artemisinine (1), a cis-fused 1,2,4-trioxane, and trans-3,3dimethyl-1,2,4-trioxane (6) in solutions of benzene, toluene, and methanol in sealed tubes were compared at temperatures between 100.1° and 171.4 °C. Pseudo first-order rate constant values were determined for conversions of both cyclic peroxides up to ca. 60%. The activation parameters and the composition of the reaction products were indicative of homolytic cleavage of their O-O bonds as the rate-determining steps followed by stepwise fragmentation. The free energies of activation (ΔG#) for 1 and 6 reactions in the aromatic solvents were calculated at the middle of each temperature range, giving values of 30.7 and 35.1 kcal/mol, respectively, which are evaluated considering their different molecular configurations. Furthermore, the rates of the thermal decomposition reactions of those trioxanes were sensitive to solvent effects. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-09 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/98261 |
url |
http://sedici.unlp.edu.ar/handle/10915/98261 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
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dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf 206-211 |
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