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Un zwitterión Rh,I, catalíticamente activo y neutro en carga, con un ligando indenídeo "desnudo" sustituido por P,N
Mark Stradiotto1, Judy Cipot, Robert McDonald
1Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3. mark.stradiotto@dal.ca
Journal of the American Chemical Society
|May 8, 2003
Resumen
Los investigadores sintetizaron nuevos complejos Rh (I) utilizando ligandos indénidos únicos. Esto condujo al primer complejo de rodio zwitteriónico neutro, un catalizador para las reacciones de acoplamiento C-H/Si-H.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- La catálisis de la catálisis.
- Coordinación Química de la Coordinación
Sus antecedentes:
- Los complejos de rodio (I) son valiosos en la catálisis.
- El desarrollo de nuevas arquitecturas de ligandos es clave para nuevas actividades catalíticas.
- Los complejos zwitteriónicos ofrecen propiedades electrónicas y estéricas únicas.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos catiónicos y zwitteriónicos Rh (I).
- Para explorar ligandos multidentados basados en unidades de indeno/indenido funcionalizadas por donantes.
- Investigar el potencial catalítico de estos nuevos complejos en el acoplamiento deshidrogenativo.
Principales métodos:
- Síntesis de complejos Rh (I) que incorporan ligandos indeno/indenuro.
- Caracterización mediante técnicas espectroscópicas y analíticas.
- Evaluación como catalizadores en las reacciones de acoplamiento deshidrogenativo C-H/Si-H.
Principales resultados:
- Síntesis exitosa de nuevos complejos catiónicos y zwitteriónicos Rh (I).
- Descubrimiento del primer [kappa2-P,N]Rh (I) zwitterion neutro en carga.
- Demostración de la actividad catalítica en el acoplamiento deshidrogenativo de estireno y trietilsilano.
Conclusiones:
- Una nueva estrategia de ligadura que utiliza unidades de indeno/indenuro es efectiva para la síntesis del complejo Rh (I).
- El nuevo complejo zwitteriónico Rh (I) es un catalizador competente para el acoplamiento C-H/Si-H.
- Este trabajo amplía el alcance de la catálisis del rodio y la química organometálica zwitteriónica.
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