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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
Synthons para complejos coordinativamente insaturados de tungsteno, y su uso para la síntesis de complejos de
Benjamin V Mork1, T Don Tilley
1Department of Chemistry, University of California, Berkeley, Berkeley, California, USA.
Journal of the American Chemical Society
|April 1, 2004
Resumen
Este estudio detalla la síntesis de nuevos complejos de sililo y silileno de tungsteno. Estos complejos ofrecen información sobre la síntesis directa de los alquilclorosilanos, cruciales para las aplicaciones industriales.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Química del tungsteno Química del tungsteno
- La catálisis es la catálisis.
Sus antecedentes:
- Los complejos de tungsteno son vitales en la catálisis y la ciencia de los materiales.
- Comprender las interacciones metal-ligando es clave para desarrollar nuevas rutas sintéticas.
- La síntesis directa de los alquilclorosilanos es un proceso industrialmente significativo.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos complejos de sililo y silileno de tungsteno.
- Investigar la reactividad de estos complejos, particularmente en relación con la activación de enlaces Si-H.
- Explorar la relevancia mecánica de estas reacciones para la producción industrial de alquilclorosilano.
Principales métodos:
- Reducción de Cp*WCl4 para formar complejos metalizados de tungsteno.
- Reacciones con monóxido de carbono, hidrógeno y silanos para formar nuevos compuestos de tungsteno.
- Abstracción de ligando de cloruro utilizando LiB ((C6F5) 4) para generar intermedios reactivos.
- Caracterización espectroscópica (NMR, cristalografía de rayos X) de compuestos sintetizados.
Principales resultados:
- Síntesis de los complejos silílicos de tungsteno (Cp*dmpe) (H) (Cl) (W) (SiHR2)).
- Formación de una especie reactiva de ligando Cp doblemente metalizado [{eta7-C5Me3{CH2) }{dmpe) W{H) }{B{C6F5) }{4}.
- Generación de complejos de sileno de tungsteno [Cp*(dmpe) H2W = SiR2][B(C6F5)4] a través de la activación del doble enlace Si-H.
- Observación del complejo de dimetilsilileno reaccionando con los cloroalcanos para obtener trialquilclorosilanos.
Conclusiones:
- Los complejos de sileno de tungsteno sintetizados son intermediarios clave en la activación del enlace Si-H.
- Las reacciones observadas proporcionan información mecanicista sobre la síntesis directa de los alquilclorosilanos.
- Esta investigación contribuye al desarrollo de procesos catalíticos industriales más eficientes.
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