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Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Los complejos de η1-Indenyl,η3-allylpalladium (II) con deficiencia de electrones se estabilizan mediante
Christophe Werlé1, Mustapha Hamdaoui, Corinne Bailly
1Institut de Chimie, Université de Strasbourg, 4 rue Blaise Pascal, F-67070 Strasbourg, France.
Journal of the American Chemical Society
|January 16, 2013
Resumen
Los nuevos complejos binucleares de paladio con 2-metil-1H-indeno exhiben fluxionalidad dinámica en solución, desafiando las suposiciones de enlaces estáticos metal-metal. Estos complejos deficientes de electrones (32e(-)) muestran oscilaciones haptotrópicas en lugar de enlaces fijos.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los complejos binucleares de paladio son cruciales en la catálisis y la ciencia de los materiales.
- Comprender las interacciones metal-metal es clave para predecir la reactividad.
- Los complejos de déficit de electrones presentan desafíos únicos de enlace y estabilidad.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos binucleares de paladio ((II) -carbono ((0).
- Para investigar la naturaleza de la interacción intermetálica dentro de estos complejos.
- Para dilucidar el comportamiento dinámico de estos complejos en solución.
Principales métodos:
- Síntesis de complejos binucleares Pd(II) -C(0). complejos.
- Análisis de difracción de rayos X para la caracterización estructural.
- Investigaciones de la Teoría Funcional de Densidad (DFT) y análisis del marco teórico de bonos.
Principales resultados:
- Estructuralmente caracterizado por complejos binucleares Pd(II) -C(0) altamente fluxionales y persistentes en solución.
- El análisis de DFT reveló interacciones intermetálicas polares con un carácter covalente mínimo.
- Se observó una fluxionalidad significativa de la solución a través de la "oscillación" haptotrópica de la porción Pd ((η ((3) -alilo).
Conclusiones:
- Los complejos no poseen un enlace estático metal-metal.
- El comportamiento de la solución está dominado por reordenamientos haptotrópicos dinámicos.
- Estos hallazgos desafían las interpretaciones tradicionales de los datos estructurales para los sistemas organometálicos fluxionales.
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