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Reducción de CO a CH3 OSiMe3: Migración de hidrógeno promovida por electrófilo en un solo sitio de Fe
Meaghan M Deegan1, Jonas C Peters1
1Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
Journal of the American Chemical Society
|February 4, 2017
Resumen
Los investigadores desarrollaron nuevos complejos de hierro para la catálisis de Fischer-Tropsch, lo que permite la formación eficiente de enlaces C-H y la liberación del producto. Este avance facilita la reducción del monóxido de carbono (CO) a productos orgánicos mediante un proceso único de migración de hidrógeno.
Área de la Ciencia:
- Química organometálica
- Catálisis
- Ciencias de los materiales
Sus antecedentes:
- El diseño de catalizadores moleculares Fischer-Tropsch eficientes es un desafío.
- Los principales desafíos incluyen la promoción de la formación de enlaces C-H y la liberación de productos derivados de CO.
Objetivo del estudio:
- Para sintetizar complejos reducidos de hidrógeno de hierro y carbonilo.
- Para permitir la migración de hidrógeno promovida por electrófilo para la reducción de CO.
Principales métodos:
- Síntesis de complejos reducidos de hidrógeno de hierro y carbonilo.
- Estudios de migración de hidrógenos impulsados por electrófilos.
- Reducción adicional con H2.
Principales resultados:
- Reducción coordinada del CO a un grupo siloximetilo (LnFe-CH2OSiMe3).
- Se ha demostrado la migración intramolecular de hidruro a CO a partir de un complejo M(CO) ((H) estable.
- Se liberó CH3OSiMe3 mediante adición de H2, mostrando una reducción neta de cuatro electrones de CO.
Conclusiones:
- Desarrolló un nuevo sistema para la reducción de CO a través de la migración de hidrógeno intramolecular.
- Esto representa el primer acceso a un proceso de este tipo desde un complejo estable M ((CO) ((H)).
- Los hallazgos avanzan en la catálisis molecular de Fischer-Tropsch y en la utilización del CO.
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