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Escisión del enlace C-C del acetonitril por un cobre dinuclear (II) criptato
Tongbu Lu1, Xiaomei Zhuang, Yanwu Li
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineer, and Instrumentation Analysis & Research Center, Sun Yat-Sen University, Guangzhou 510275, P R China. cesltb@zsu.edu.cn
Journal of the American Chemical Society
|April 15, 2004
Resumen
Un complejo de criptato de cobre ((II) dinuclear rompe el enlace C-C del acetonitrilo a temperatura ambiente. Esta reacción forma un nuevo complejo de cobre con puente de cianuro, revelando una nueva vía de transformación química.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Química organometálica Química orgánica de los metales.
- Química supramolecular de las moléculas.
Sus antecedentes:
- Los complejos dinucleares de cobre (II) exhiben una reactividad diversa.
- Los ligandos de criptato ofrecen entornos estructurales y electrónicos únicos.
- El acetonitrilo es un disolvente común y un sustrato potencial para la activación del enlace C-C.
Objetivo del estudio:
- Para investigar la reactividad de un complejo de criptato dinuclear de cobre (II) con acetonitrilo.
- Para dilucidar el mecanismo de la escisión del enlace C-C en el acetonitrilo.
- Para caracterizar el resultante complejo de cobre con puente de cianuro.
Principales métodos:
- Síntesis y caracterización del complejo dinuclear de cobre (II) criptato [Cu2L] (ClO4) 4.4.
- Reacción del complejo de cobre con el acetonitrilo a temperatura ambiente.
- Determinación de la estructura cristalina de rayos X del complejo del producto.
- Análisis espectroscópico que incluye absorción electrónica, ESI-MS y GC.
Principales resultados:
- El complejo de criptato de cobre ((II) dinuclear rompió con éxito el enlace C-C del acetonitrilo.
- Se formó un nuevo complejo dinuclear de cobre ((II) con puente de cianuro, [Cu2L ((CN)) ] ((ClO4) 3.2CH3CN.4H2O).
- La estructura de cristal confirmó el puente de cianuro y la arquitectura compleja en general.
- Los datos espectroscópicos apoyaron la vía de reacción propuesta y la identidad del producto.
Conclusiones:
- Los criptatos dinucleares de cobre (II) pueden activar y cortar el enlace C-C del acetonitrilo.
- Este estudio demuestra una nueva ruta sintética para los complejos de cobre con puentes de cianuro.
- Los hallazgos contribuyen a comprender la funcionalización de los enlaces C-C mediados por el cobre.
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