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Reactividad de los nitritos de torio multimetales generados por la reducción de azidas de torio

Fang-Che Hsueh¹, Luciano Barluzzi¹, Megan Keener¹

¹Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

Journal of the American Chemical Society

|February 9, 2022

Resumen

Los grupos estables de nitruro de torio, M3ThNTh (M = K o Cs), se sintetizaron reduciendo los precursores de azido de torio. Estos compuestos de elementos f son estables en solución y pueden dividir el monóxido de carbono (CO) en condiciones ambientales.

Área de la Ciencia:

Química de coordinación
Química organometálica
Química inorgánica

Sus antecedentes:

Los nitritos de torio son intermedios clave en la escisión y la funcionalización del nitrógeno (N2) por complejos de torio.
El estudio de los nitritos de torio ofrece información sobre la formación de enlaces múltiples en la química de los elementos f.
Investigaciones anteriores informaron de nitritos de torio aislables limitados de la solución.

Objetivo del estudio:

Desarrollar una nueva vía sintética para complejos estables de nitruro de torio.
Investigar las propiedades estructurales y químicas de estos nuevos nitritos de torio.
Para explorar la reactividad de los nitritos de torio, específicamente su capacidad para dividir moléculas pequeñas.

Principales métodos:

Reducción de los precursores de azido de torio en condiciones de reacción cuidadosamente controladas.
Aislamiento y caracterización de los grupos de azido y nitruro de torio multimetales (M3ThNTh, M = K o Cs).
Análisis estructural y estudios de reactividad, incluida la escisión del monóxido de carbono (CO).

Principales resultados:

Se han sintetizado con éxito complejos estables de azido y nitruro de torio multimetales.
La presencia de iones alcalinos (K o Cs) fue crucial para estabilizar los grupos de nitruro en solución.
Se observaron variaciones estructurales, con una fracción de ThNTh doblada en el complejo ligado a K y una disposición lineal en el complejo ligado a Cs.
Los nitritos de torio sintetizados demostraron la capacidad de dividir el CO en condiciones ambientales, formando cianuro (CN-).

Conclusiones:

Se ha establecido un método nuevo y eficaz para sintetizar nitritos de torio estables.
Los iones de metales alcalinos juegan un papel crítico en la estabilización de estos complejos de nitruro de elementos f.
Los nitritos de torio exhiben una reactividad significativa, incluida la escisión del monóxido de carbono, abriendo vías para aplicaciones catalíticas.

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