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Un complejo de hierro (IV) -oxo de alto espín apoyado por una plataforma trigonal de pirrolido no hemo
Julian P Bigi1, W Hill Harman, Benedikt Lassalle-Kaiser
1Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA.
Journal of the American Chemical Society
|January 5, 2012
Resumen
Hemos sintetizado un nuevo complejo de hierro de alto espín ((IV) -oxo utilizando una plataforma de pirrolido. Este complejo de hierro demuestra reactividad en la oxidación C-H y la transferencia de átomos de oxígeno, avanzando en la investigación de catálisis.
Área de la Ciencia:
- Química Inorgánica La química inorgánica es la química inorgánica.
- Química organometálica Química orgánica de los metales.
- La catálisis de la catálisis.
Sus antecedentes:
- Los complejos de hierro no hemo son cruciales en los sistemas biológicos y la catálisis.
- Comprender las especies de oxóferos de hierro de alta valencia es clave para dilucidar los mecanismos de reacción.
- Los ligandos pirrolidos ofrecen propiedades electrónicas y estéricas únicas para la estabilización de complejos metálicos.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo complejo de hierro (IV) - oxo de alto espín.
- Para investigar la reactividad de este complejo en reacciones de oxidación.
- Explorar el potencial de los complejos de hierro soportados por pirrolido en la catálisis.
Principales métodos:
- Síntesis de un complejo de hierro trigonal no hemo soportado por pirrolido. complejo de hierro.
- Caracterización mediante espectrometría de masas, UV-vis, espectroscopia FTIR, Mössbauer, XAS y EPR.
- Estudios de reactividad que involucran transferencia de átomos de oxígeno y oxidación C-H.
Principales resultados:
- Generación exitosa de un complejo de hierro ((IV) -oxo de alto espín, [ ((tpa ((Ph)) Fe ((IV)) ((O)))) ((-).
- Los datos espectroscópicos confirmaron el estado de oxidación Fe (IV) y el cromóforo de hierro-oxo.
- El complejo exhibió características de alto espín (S = 2) y medió la oxidación intermolecular C-H y la transferencia de átomos de oxígeno.
Conclusiones:
- Se sintetizó y caracterizó un nuevo complejo de hierro (IV) -oxo de alto espín soportado por una plataforma de pirrolido.
- Este complejo sirve como un catalizador potencial para las reacciones de oxidación.
- El estudio amplía el alcance de la química del hierro no hemo y sus aplicaciones catalíticas.
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