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Tetrakis ((2-hidroxifenil) eteno y sus derivados. Un sistema de ligando tetradentado estructuralmente preorganizado
Udo Verkerk1, Megumi Fujita, Trevor L Dzwiniel
1Department of Chemistry, University of Alberta, Edmonton, T6G 2G2 Canada.
Journal of the American Chemical Society
|August 22, 2002
Resumen
Un nuevo ligando tetradentado, el tetrakis ((2-hidroxifenil) eteno, ofrece una plataforma rígida pero flexible para la química de coordinación polimétrica. Su estructura única facilita el puenteado de metales, permitiendo nuevas formaciones complejas.
Área de la Ciencia:
- Coordinación Química de la Coordinación
- Síntesis orgánica La síntesis orgánica.
- Química supramolecular de las moléculas.
Sus antecedentes:
- El desarrollo de ligandos conformacionalmente restringidos es crucial para controlar la coordinación del metal.
- Los derivados de tetrafeniletileno ofrecen un núcleo rígido para el diseño de ligandos.
- Los complejos polimetales requieren ligandos que promueven el puente sobre la quelación.
Objetivo del estudio:
- Síntesis y caracterización de un nuevo sistema de ligandos tetradentados basado en el tetráquido ((2-hidroxifenil) eteno.
- Para explorar la capacidad del ligando para formar complejos polimetales de coordinación.
- Investigar las propiedades estructurales y conformacionales del ligando y sus complejos.
Principales métodos:
- Síntesis orgánica en varios pasos a partir de derivados de anisoles.
- Descomposición catalizada por ácido de diaril diazometanos para la formación de núcleos de tetrafeniletileno.
- Cristalografía de rayos X y caracterización del estado de solución de complejos de ligandos y metales.
Principales resultados:
- Síntesis exitosa de tetrakis ((2-hidroxifenil) eteno y sus derivados sustituidos.
- Se ha demostrado la síntesis de alto rendimiento del núcleo de tetrafeniletileno estéricamente obstaculizado.
- Caracterización de un complejo de corona de aluminio y oxígeno de anillo de ocho miembros, que muestra los modos de coordinación de puente.
Conclusiones:
- El tetrakis ((2-hidroxifenil) eteno representa un andamio de ligando topológicamente único para la química polimétrica.
- El diseño del ligando permite una flexibilidad conformacional ajustable y promueve el puenteado de metales.
- Esta clase de ligandos tiene un potencial significativo para desarrollar nuevos complejos y materiales de coordinación.
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