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Síntesis y reactividad de acoplamiento C-C de un complejo dinuclear Ni(i) -Ni(i) apoyado por un terfenil difosfina

Alexandra Velian¹, Sibo Lin, Alexander J M Miller

¹Division of Chemistry and Chemical Engineering, Arnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, USA.

Journal of the American Chemical Society

|April 20, 2010

Resumen

Se sintetizaron nuevos complejos de níquel con ligandos de terfenil difosfina. Estos complejos facilitan la formación de enlaces carbono-carbono en sitios bimetálicos, lo que lleva a los derivados del fluoreno.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
Coordinación Química de la Coordinación
La catálisis es la catálisis.

Sus antecedentes:

Los ligandos de terfenil difosfina son cruciales en la estabilización de los complejos metálicos.
Los complejos de níquel son versátiles en aplicaciones catalíticas.
Comprender las interacciones metal-areno es clave para diseñar nuevas reacciones.

Objetivo del estudio:

Para sintetizar nuevos complejos monometálicos y bimetálicos de níquel apoyados por ligandos de terfenil difosfina.
Investigar las estructuras de estado sólido y las interacciones metal-arena de estos complejos.
Para explorar la reactividad de los complejos de dinickel en la formación de enlaces carbono-carbono.

Principales métodos:

Síntesis de complejos de níquel-terfenil difosfina.
Cristalografía de rayos X para la determinación de la estructura en estado sólido.
Estudios de reacción con monóxido de carbono y dicloralcanes.

Principales resultados:

Síntesis exitosa de diversos complejos monometálicos y bimetálicos de níquel.
Observación de las variadas interacciones metal-areno en estado sólido.
Formación de derivados de fluoreno a partir de reacciones complejas de dinickel, lo que indica la formación de enlaces C-C en el centro bimetálico.

Conclusiones:

Los ligandos de terfenil difosfina apoyan eficazmente los complejos de níquel con propiedades estructurales y reactivas interesantes.
La fracción del complejo dinickel puede participar en las reacciones de formación de enlaces carbono-carbono.
Estos hallazgos abren caminos para el desarrollo de nuevos procesos catalíticos que involucran sistemas de níquel bimetálico.

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