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Complejos de perfluoroalquilo de cobalto (III) fluoruro y bis (perfluoroalquilo): fluoración catalítica y formación
Matthew C Leclerc1, Julia M Bayne1, Graham M Lee1
1Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada.
Journal of the American Chemical Society
|December 18, 2015
Resumen
Los nuevos complejos de cobalto con ligandos perfluoroalquilo muestran actividad catalítica en las reacciones de fluoración. Estos complejos pueden generar difluorocarbenos intermedios para el alargamiento de la cadena perfluoroalquílica, ofreciendo potencial para sintetizar moléculas y polímeros fluorados.
Área de la Ciencia:
- Química organometálica
- Química del fluor
- Catálisis
Sus antecedentes:
- Los complejos de perfluoroalquilo cobalto son valiosos en la química sintética.
- Comprender su reactividad es clave para desarrollar nuevos métodos de fluoración.
Objetivo del estudio:
- Sintetizar y caracterizar los nuevos complejos de perfluoroalquilo cobalto (III) fluoruro.
- Investigar su actividad catalítica en reacciones de fluoración.
- Explorar la reactividad de los complejos de cobalto (III) bis (perfluoroalquilo) y sus intermedios de difluorocarbenos.
Principales métodos:
- Análisis elemental
- Espectroscopia de RMN multinuclear
- Cristalografía de rayos X
- Difracción de rayos X en polvo
- Estudios computacionales
Principales resultados:
- Se han sintetizado y caracterizado con éxito cuatro complejos de fluoruro de perfluoroalquilo de cobalto.
- Se han observado cambios químicos significativos en el fluoruro de cobalto (19) en la RMN, analizados por computación.
- Actividad catalítica demostrada en la fluoración del cloruro de p-toluoilo.
- Complejos de cobalto (III) bis (perfluoroalquilo) sintetizados y complejos de cobalto difluorocarbeno generados.
- Se ha demostrado la inserción de difluorocarbenos en fragmentos de perfluoroalquilo para el alargamiento de la cadena.
Conclusiones:
- Los complejos de cobalto sintetizados exhiben un potencial catalítico para la fluoración.
- Los intermediarios de difluorocarbenos derivados de estos complejos pueden utilizarse para alargar las cadenas perfluoroalquilo.
- Estos hallazgos ofrecen información sobre las aplicaciones catalíticas para la síntesis de moléculas fluoradas y fluoropolímeros.
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