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Ensamblaje de ligandos de cianuro por transferencia de átomos de carbono a un nitruro de hierro
Jorge L Martinez1, Hsiu-Jung Lin1, Wei-Tsung Lee1
1Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States.
Journal of the American Chemical Society
|September 22, 2017
Resumen
Este estudio detalla una nueva reacción de cuatro electrones de un complejo de nitruro de hierro con un ligando de ciclopropenilideno. La reacción produce un ligando de cianuro y una alquina, mostrando una química única de transferencia de átomos de carbono.
Área de la Ciencia:
- Química organometálica
- Química inorgánica
- Catálisis
Sus antecedentes:
- Los complejos de nitruro de hierro son intermedios clave en la fijación del nitrógeno y en los ciclos catalíticos.
- Comprender la reactividad de los complejos de hierro de alta valencia es crucial para el desarrollo de nuevas metodologías sintéticas.
- Los ligandos de ciclopropenilideno ofrecen propiedades electrónicas y estéricas únicas para la química de coordinación.
Objetivo del estudio:
- Investigar la reactividad de un nuevo complejo de nitruro de hierro.
- Para explorar reacciones inusuales de transferencia de múltiples electrones que involucran la transferencia de átomos de carbono.
- Para sintetizar nuevos complejos de hierro con funciones de cianuro y alquino.
Principales métodos:
- Reacción de PhB ((iPr2Im) 3FeN con el bis ((diisopropylamino) ciclopropenilideno (BAC).
- Caracterización del complejo de hierro resultante mediante técnicas espectroscópicas.
- Reacciones adicionales con monóxido de carbono (CO) y boro (C6F5) 3 para explorar la formación de derivados.
Principales resultados:
- El complejo de nitruro de hierro se somete a una reacción de cuatro electrones con BAC, formando un ligando cianuro y un alquino.
- Se sintetiza un nuevo complejo de hierro, PhB ((iPr2Im) 3Fe ((CN)) ((N2) ((BAC), que existe en equilibrio con una especie libre de N2.
- Las reacciones posteriores producen análogos de CO y derivados de cianoborano, lo que demuestra una reactividad versátil.
Conclusiones:
- Este trabajo presenta un ejemplo sin precedentes de transferencia de átomos de carbono de un ligando de ciclopropenilideno a un nitruro de hierro.
- El estudio amplía la reactividad conocida de los complejos de nitruro de hierro y proporciona acceso a nuevos compuestos organometálicos.
- Los hallazgos ofrecen información sobre los mecanismos de las transformaciones de múltiples electrones en la química de coordinación.
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