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Generación, caracterización y reactividad de un complejo de radicales Cu (II) - Alquilperóxido / Anilino: información

Sayantan Paria¹, Takehiro Ohta², Yuma Morimoto¹

¹Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.

Journal of the American Chemical Society

|August 21, 2015

Resumen

Los investigadores sintetizaron un nuevo complejo de cobre (2) mediante la reacción de un precursor de cobre con hidroperoxido de comino a bajas temperaturas. Este estudio detalla la formación y la reactividad de esta especie única de radicales Cu (II) -alquilperóxido/anilino.

Área de la Ciencia:

Química organometálica
Química de coordinación
Mecanismos de reacción

Sus antecedentes:

Los complejos de cobre son catalizadores vitales en varias transformaciones químicas.
Comprender la reactividad del cobre-oxo y las especies relacionadas es crucial para los ciclos catalíticos.
Los hidroperoxidos de alquilo son oxidantes comunes en la síntesis orgánica.

Objetivo del estudio:

Síntesis y caracterización de un nuevo complejo de cobre-alquilperóxido/anilina.
Para investigar el mecanismo de formación de este complejo.
Para explorar la reactividad del recién formado complejo de cobre.

Principales métodos:

Reacción a baja temperatura de un precursor de cobre con hidroperoxido de comino.
Caracterización espectroscópica que incluye UV-vis, resonancia Raman y EPR.
Espectrometría de masas (CSI-masa) para la confirmación estructural.

Principales resultados:

Se logró la formación de un complejo de Cu (II) -alquilperóxido/radical anilino (2) a -60 °C.
La formación del complejo fue inequívocamente confirmada por múltiples técnicas espectroscópicas.
Se realizaron estudios iniciales sobre el mecanismo y la reactividad del complejo 2.

Conclusiones:

Se ha sintetizado y caracterizado con éxito un nuevo tipo de complejo de radicales de cobre (II) -alquilperóxido/anilina.
Los resultados proporcionan información sobre la reactividad a baja temperatura de los complejos de cobre con hidroperoxidos.
Este trabajo sienta las bases para futuras investigaciones sobre el potencial catalítico de estas especies.

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