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Reducción mediada por cobre de CO2 con pinB-SiMe2Ph a través de la inserción de CO2 en un enlace de cobre y silicio

Christian Kleeberg¹, Man Sing Cheung, Zhenyang Lin

¹Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany. ch.kleeberg@tu-braunschweig.de

Journal of the American Chemical Society

|November 10, 2011

Resumen

Este estudio demuestra una reducción catalítica de dióxido de carbono (CO2) a monóxido de carbono (CO) utilizando un complejo de cobre-sililo y un reactivo de sililborano. Este nuevo método ofrece una vía potencial para la utilización y conversión de CO2.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
La catálisis es la catálisis.
Química Inorgánica La Química Inorgánica es la química inorgánica.

Sus antecedentes:

Las reacciones catalizadas por el cobre son cruciales en la química sintética.
La utilización de dióxido de carbono (CO2) sigue siendo un desafío importante.
Los sililboranos ofrecen perfiles de reactividad únicos.

Objetivo del estudio:

Para investigar la reacción de un complejo cobre-sililo con dióxido de carbono.
Para explorar la reducción catalítica del CO2 a CO.
Para caracterizar los productos intermedios y finales.

Principales métodos:

Síntesis y aislamiento de complejos de cobre-sililo, silanecarboxilo y silanolato.
Espectroscopia de RMN 13C in situ para estudiar los mecanismos de reacción.
Difracción de rayos X monocristalino para la caracterización estructural.

Principales resultados:

Formación de un complejo cobre-sililo [(IPr) Cu-SiMe2Ph] a partir de [(IPr) Cu-OtBu] y pinB-SiMe2Ph.
Inserción de CO2 en el enlace Cu-Si, seguido de la extrusión de CO para obtener un complejo de silanolato.
Reducción catalítica de CO2 a CO y formación de subproductos de sililboronato y disiloxano.

Conclusiones:

Se propone un ciclo catalítico para la reducción de CO2 a CO utilizando un complejo de cobre-sililo y sililborano.
El mecanismo de reacción implica la inserción de CO2 y la subsiguiente extrusión de CO.
El sililborano actúa como un agente reductor estequiométrico, produciendo valiosos subproductos.

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