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La transferencia de átomo oxidativo a un complejo de trimanángeno para formar clusters de Mn6 (((μ6-E) (E = O, N) con
Alison R Fout1, Qinliang Zhao, Dianne J Xiao
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge Massachusetts 02138, USA.
Journal of the American Chemical Society
|September 28, 2011
Resumen
Los investigadores sintetizaron un nuevo complejo trinuclear de manganeso. Este complejo reacciona con reactivos de oxígeno y nitrógeno para formar complejos de manganeso hexanucleares únicos de micro(6) -oxo y micro(6) -nitruro, expandiendo la química inorgánica.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Coordinación Química de la Coordinación
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- Los complejos de manganeso son cruciales en varios procesos catalíticos.
- El desarrollo de nuevos complejos de manganeso multinucleares con funcionalidades específicas es un área activa de investigación.
- Comprender la reactividad de los grupos de manganeso con moléculas pequeñas como el oxígeno y el nitrógeno es clave para diseñar nuevos catalizadores.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo complejo trinuclear de manganeso utilizando un ligando hexadentado.
- Para investigar la reactividad de este complejo con reactivos de transferencia de átomos de oxígeno y azida inorgánica.
- Explorar las propiedades estructurales y electrónicas de los complejos de manganeso multinucleares de oxo y nitruro resultantes.
Principales métodos:
- Síntesis y caracterización de un complejo trinuclear de manganeso ((H) L) Mn ((3) ((thf) ((3).
- Reacción del complejo trinuclear con los reactivos de transferencia de átomos O para formar un complejo micro(6) -oxo.
- Reacción con azido inorgánico para formar un complejo de nitruro hexanuclear, seguido de oxidación.
- Espectroscopia de resonancia paramagnética de electrones (EPR) y cristalografía de rayos X para análisis estructural y electrónico.
Principales resultados:
- Se sintetizó con éxito un nuevo complejo trinuclear de manganeso, ((H) L) Mn ((3) ((thf) ((3).
- El complejo forma fácilmente un complejo hexanuclear micro(6)-oxo con reactivos de transferencia de átomos O.
- La reacción con azida produce un complejo de nitruro hexanuclear, que puede ser oxidado aún más.
- El EPR y el análisis estructural distinguieron entre los complejos de oxo y nitruro, revelando distintos estados de oxidación del manganeso.
Conclusiones:
- La plataforma de ligandos hexadentados permite la formación de complejos de manganeso multinucleares estables.
- El complejo de manganeso trinuclear sintetizado exhibe una reactividad versátil hacia las especies de oxígeno y nitrógeno.
- El estudio proporciona información sobre la diversidad estructural y las propiedades electrónicas de los grupos de manganeso micro(6) -oxo y micro(6) -nitruro.
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