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Los carbenos bis-N-heterocíclicos (NHC) estabilizaron los complejos de hierro (((0) de η6-areno: síntesis,

Burgert Blom¹, Gengwen Tan, Stephan Enthaler

¹Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin , Strasse des 17. Juni 135, Sekr. C2, D-10623 Berlin, Germany.

Journal of the American Chemical Society

|November 8, 2013

Resumen

Este estudio introduce nuevos complejos de hierro (((0) areno estabilizados por ligandos de carbenos bis-N-heterocíclicos. Estos complejos demuestran potencial como precatalizadores para la reducción de amida, mostrando una nueva vía en la catálisis del hierro.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
La catálisis de la catálisis.
Síntesis Inorgánica y Síntesis Inorgánica.

Sus antecedentes:

Los complejos de hierro con ligandos de carbenos N-heterocíclicos (NHC) son de creciente interés.
Los complejos estabilizados de hierro de baja valencia son cruciales para las aplicaciones catalíticas.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos complejos de hierro (((0) con ligandos bis-NHC.
Investigar la reactividad y el potencial catalítico de estos nuevos complejos de hierro.

Principales métodos:

Síntesis de complejos de hierro (II) y hierro (O) mediante la reducción de FeCl2 con un ligando bis-NHC.
Caracterización mediante cálculos DFT y espectroscopia (57) Fe Mössbauer.
Evaluación de la actividad catalítica en las reacciones de reducción de amida.

Principales resultados:

Primera síntesis de complejos de areno de hierro (((0) estabilizados por un ligando bis-NHC.
Demostración de la activación intramolecular de C-H y las vías de eliminación reductiva.
Aplicación exitosa de un complejo de hierro (((0) como un precatalizador para la reducción de amidas con altos rendimientos.

Conclusiones:

Los nuevos complejos de hierro-areno están bien definidos y son estables.
Estos complejos representan un avance significativo en el campo de la química del hierro de baja valencia.
La aplicación catalítica destaca el potencial de estos complejos en la síntesis orgánica.

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