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La síntesis facilitada por la metátesis de complejos terminales de carburo de rutenio: una reacción de transferencia
Robert G Carlson1, Melanie A Gile, Joseph A Heppert
1The Department of Chemistry, 2010 Malott Hall, University of Kansas, Lawrence, Kansas 66045, USA.
Journal of the American Chemical Society
|February 21, 2002
Resumen
Los catalizadores de rutenio forman nuevos complejos terminales de carburo de rutenio al reaccionar con los derivados del ciclopropano. Estos compuestos estables y diamagnéticos presentan un enlace triple rutenio-carbono muy corto, confirmado por la cristalografía de rayos X.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- La catálisis de la catálisis.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los catalizadores de rutenio son fundamentales en la metátesis de las olefinas.
- Los derivados del ciclopropano ofrecen vías de reactividad únicas.
- Los complejos de carburo terminal son sintéticamente difíciles.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos terminales de carburo de rutenio.
- Para investigar la reactividad de los catalizadores de rutenio benzilideno con sustratos de ciclopropano.
- Para dilucidar las características de enlace del enlace rutenio-carbono en estos nuevos complejos.
Principales métodos:
- Reacción de catalizadores de metátesis de rutenio benzilideno con el 2,3-dicarbomethoxymethylene-ciclopropano.
- Aislamiento y purificación de los complejos de carburo de rutenio resultantes.
- Cristalografía de rayos X para la determinación estructural.
Principales resultados:
- Síntesis exitosa de los primeros complejos terminales de carburo de rutenio.
- Los productos exhiben propiedades diamagnéticas, estabilidad al aire y solubilidad moderada.
- El análisis de rayos X revela una distancia de enlace Ru-C muy corta (1.650(2) Å), indicativa de un enlace triple.
Conclusiones:
- Los catalizadores de benzilideno de rutenio pueden generar efectivamente complejos terminales de carburo de rutenio.
- Los complejos sintetizados poseen estabilidad deseable y características de solubilidad.
- El enlace corto Ru-C confirma la presencia de un enlace triple rutenio-carbono, lo que hace avanzar la comprensión de los enlaces organometálicos.
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