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The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
Química metalosupramolecular con los ligandos bis ((benceno-o-ditiolato) de las moléculas
Thorsten Kreickmann1, Christian Diedrich, Tania Pape
1Institut für Anorganische und Analytische Chemie, Universität Münster, Wilhelm Klemm Strasse 8, 48149 Münster, Germany.
Journal of the American Chemical Society
|September 7, 2006
Resumen
Los complejos de titanio con ligandos bis ((benceno-o-ditilo) forman helicatos dinucleares de triple cadena y complejos de doble cadena. La quiralidad en los ligandos induce centros metálicos quirales, influyendo en la simetría y estructura complejas.
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 de titanio son versátiles en la química de la coordinación.
- Los ligandos bis ((benceno-o-diitio) ofrecen entornos de coordinación únicos.
- Las estructuras helicoidales y de doble cadena son de gran interés en la química supramolecular.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos dinucleares de titanio.
- Investigar la diversidad estructural y la simetría de estos complejos.
- Explorar la influencia de la quiralidad del ligando en la formación y propiedades complejas.
Principales métodos:
- Reacción de los ligandos bis ((benceno-o-dietil) con los precursores del titanio.
- Caracterización espectroscópica que incluye espectroscopia de RMN y CD.
- Cristalografía de rayos X para el análisis estructural detallado.
Principales resultados:
- Formación de helicatos de tres hebras dinucleares ([Ti(2)L(3)](4-)) y complejos de doble hebra.
- Los aniones complejos exhiben simetrías variables (C3, C2) dependiendo del ligando y el contraion.
- Los ligandos enantioméricamente puros conducen a centros metálicos quirales y efectos de algodón en los espectros de CD.
- Un estudio comparativo revela diferencias en el enlace de hidrógeno basado en el tipo de ligando (ditilo vs. dicatecol).
Conclusiones:
- Los ligandos bis ((benceno-o-ditilo) se coordinan efectivamente con el titanio para formar complejas estructuras multinucleares.
- El diseño de los ligandos tiene un impacto significativo en la simetría y el ensamblaje supramolecular de los complejos de titanio.
- Los ligandos quirales pueden inducir la quiralidad en los centros de titanio, abriendo caminos para los materiales quirales.
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