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Formación gradual de un cuadrado molecular con puentes de bloques de construcción de dicarbenos sustituidos por NH,O
Fabian M Conrady1, Roland Fröhlich, Christian Schulte to Brinke
1Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany.
Journal of the American Chemical Society
|July 7, 2011
Resumen
Los investigadores ensamblaron un nuevo cuadrado molecular utilizando complejos de iridio y un ligando de diisocianuro. La desprotección del ligando formó un cuadrado con puentes de dicarbenos, mostrando una nueva ruta hacia arquitecturas moleculares complejas.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Química supramolecular de las moléculas.
- Química organometálica Química orgánica de los metales.
Sus antecedentes:
- Los cuadrados metal-orgánicos son estructuras supramoleculares versátiles con aplicaciones en catálisis y ciencias de los materiales.
- El ensamblaje gradual ofrece control sobre la formación de arquitecturas complejas.
- Los complejos de iridio son bloques de construcción valiosos para los compuestos de coordinación.
Objetivo del estudio:
- Para desarrollar una síntesis paso a paso de una novela [Ir(Cp*) Cl] acorralado cuadrado molecular.
- Para investigar la formación de enlaces dicarbenos dentro de la estructura cuadrada molecular.
- Explorar nuevos métodos para la construcción de estructuras organometálicas complejas.
Principales métodos:
- Ensamblaje paso a paso utilizando β,β'-bis(triisopropilsiloxi) fenil-1,4-diisocianuro y [Ir(Cp*) Cl(2) ](2).
- Síntesis de un cuadrado molecular puenteado de tetracis (((diisocianuro), [Ir (((Cp*) Cl (((3)) ] (((4) ((BF ((4)) ((4) [5] ((BF ((4)))) ((4).
- Cleavage de los enlaces O-Si ((i-Pr) ((3)) con HCl / i-PrOH para inducir la ciclización intramolecular.
Principales resultados:
- El ensamblaje paso a paso exitoso del cuadrado molecular arrinconado [Ir(Cp*) Cl].
- Formación de un cuadrado molecular con puente de dicarbeno, [6](Cl)(4), a través de un ataque intramolecular.
- Demostración de una ruta sintética hacia cuadrados organometálicos funcionalizados.
Conclusiones:
- El estudio presenta un nuevo método para construir cuadrados moleculares con enlaces de dicarbenos.
- La estrategia desarrollada permite el ensamblaje controlado de complejas estructuras supramoleculares basadas en iridio.
- Este trabajo amplía el conjunto de herramientas para diseñar y sintetizar materiales organometálicos funcionales.
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