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Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
Published on: October 3, 2014
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Los complejos secundarios de fosfinocarbino y fosfaisonitrilo son complejos secundarios de fosfinocarbino y
Annie L Colebatch1, Anthony F Hill
1Research School of Chemistry, Australian National University , Canberra, ACT 2601, Australia.
Journal of the American Chemical Society
|December 4, 2014
Resumen
Los investigadores sintetizaron nuevos complejos de tungsteno, fosfinocarbino y fosfaisonitrilo utilizando la catálisis del paladio. Estos hallazgos amplían el alcance de la química organometálica y los compuestos de coordinación.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Química del tungsteno Química del tungsteno
- Química del fósforo Química del fósforo
Sus antecedentes:
- Los complejos de carbino de tungsteno son versátiles intermediarios sintéticos.
- Las reacciones catalizadas por el paladio ofrecen rutas eficientes a moléculas complejas.
- Comprender la reactividad de los enlaces W-C es crucial para la catálisis.
Objetivo del estudio:
- Para sintetizar nuevos complejos secundarios de fosfinocarbina de tungsteno.
- Para explorar la desprotonación de estos complejos para formar fosfaisonitriles aniónicos.
- Para caracterizar estructuralmente los compuestos de tungsteno y fósforo resultantes.
Principales métodos:
- El acoplamiento catalizado por paladio de un precursor de bromo de tungsteno (carbino) con fosfinas primarias.
- Deprotonación de los complejos de fosfinocarbino utilizando una base fuerte.
- Cristalografía de rayos X para elucidación estructural del complejo aniónico.
Principales resultados:
- Síntesis exitosa de complejos secundarios de fosfinocarbina [W(CPHR) ((CO) 2 ((Tp*) ] a través de la catálisis del paladio.
- Formación de complejos aniónicos de fosfaisonitrilo [W(CPR) ((CO) 2 ((Tp*) ]) después de la desprotonación.
- Caracterización estructural de la sal de potasio [W ((CPPh) ((CO) 2 ((Tp*)][K ((kryptofix) ] que revela una interacción de enlace W-P única.
Conclusiones:
- La reacción mediada por el paladio proporciona una ruta viable a los complejos funcionalizados de tungsteno fosfinocarbino.
- La desprotonación ofrece acceso a especies aniónicas de fosfaisonitrilo con aplicaciones potenciales en la ciencia de los materiales.
- Los datos estructurales proporcionan información sobre la unión y la reactividad en estos nuevos compuestos organometálicos.
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