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Interacción de los complejos organoplatino (II) con los triflados monovalentes de metales de acuñación
Marc-Etienne Moret1, Peter Chen
1Laboratorium für Organische Chemie, Eidgenössische Technische Hochschule (ETH) Zürich, CH-8093 Zürich, Switzerland.
Journal of the American Chemical Society
|April 1, 2009
Resumen
Los complejos organoplatino (II) forman enlaces dativos con el cobre y la plata, creando nuevos complejos homo- y heterolepticos. Estos complejos exhiben interacciones de enlace y reactividad únicas, incluida la activación C-H.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Coordinación Química de la Coordinación
- Química Inorgánica La química inorgánica es la química inorgánica.
Sus antecedentes:
- Se conocen complejos organoplatino (II) con ligandos quelatantes N,N.
- Los metales de las monedas (cobre y plata) son ácidos de Lewis versátiles.
- Comprender las interacciones metal-metal es crucial en la química de la coordinación.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos de organoplatino (II) con cobre (I) y plata (I) triflados.
- Para investigar la naturaleza de las interacciones de unión entre el platino y los metales de la moneda.
- Explorar la reactividad de estos nuevos complejos, incluyendo la activación C-H.
Principales métodos:
- Síntesis de los complejos organoplatino (II) [NN) PtMe (II) ] y [NN) PtPh (II) ] .
- Formación de complejos homo- y heterolepticos con el cobre (I) y la plata (I) triflados.
- Caracterización mediante difracción de rayos X, espectroscopia y cálculos DFT.
Principales resultados:
- [(NN)PtMe(2)] forma enlaces Pt-->M dativos con Cu(I) y Ag(I) a través de su orbital d(z^2).
- [(NN)PtPh(2)] se une a través de la complejación eta(1) o eta(2) de los carbonos fenil-ipso, formando complejos homoleptos.
- Se observan enlaces Pt-->M no soportados para [(NN) PtPh(2) ], y la termólisis produce [(NN) PtPh(2) ] a través de la activación C-H.
Conclusiones:
- Se han sintetizado nuevos complejos metálicos organoplatino-moneda con interacciones únicas Pt->M.
- Los modos de unión dependen del complejo de platino y del metal de la moneda.
- Estos complejos demuestran potencial para aplicaciones catalíticas, particularmente en los procesos de activación de C-H.
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