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Los complejos orgánico-metálicos mononucleares estables Pd(III) y su reactividad para la formación de enlaces C-C
Julia R Khusnutdinova1, Nigam P Rath, Liviu M Mirica
1Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
Journal of the American Chemical Society
|May 14, 2010
Resumen
Los investigadores sintetizaron y caracterizaron los primeros complejos estables mononucleares organometálicos de paladio (III). Estos nuevos complejos Pd(III) permiten la formación de enlaces carbono-carbono inducidos por la luz, dando lugar a productos de etano y bifenilo.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- La catálisis es la catálisis.
- Coordinación Química de la Coordinación
Sus antecedentes:
- Los complejos organometálicos de paladio (III) son intermediarios clave en la catálisis.
- Los complejos mononucleares de paladio (III) no han sido previamente aislados.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos organometálicos mononucleares de paladio (III).
- Para investigar la reactividad y las propiedades de estos complejos Pd.
Principales métodos:
- Síntesis de precursores de Pd(II) apoyados por un ligando N4 tetradentado.
- Oxidación química o electroquímica para generar especies de Pd.
- Caracterización mediante difracción de rayos X, voltametría cíclica, vis UV, EPR, mediciones magnéticas y DFT.
Principales resultados:
- Aislamiento y caracterización de los complejos organometálicos mononucleares estables Pd(III).
- Confirmación de los centros paramagnéticos d(7) y Pd(III).
- Observación de la formación de enlaces C-C inducida por la luz, produciendo etano y bifenilo.
Conclusiones:
- Se han sintetizado y caracterizado con éxito los primeros complejos organometálicos mononucleares estables Pd(III).
- Estos complejos exhiben una reactividad única, incluyendo el homoacoplamiento inducido por la luz.
- La formación de etano a partir de complejos de monometil Pd es un nuevo hallazgo significativo.
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