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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
[[(Me3Si) 2CH]2(i)PrSi(NHC)SiSi(Me)Si(i)Pr[CH(SiMe3)2]2]+: una molécula con el carácter del catión disilenilo
Torahiko Yamaguchi1, Matthew Asay, Akira Sekiguchi
1Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
Journal of the American Chemical Society
|December 24, 2011
Resumen
Los investigadores sintetizaron el primer análogo del grupo 14 de elementos pesados estabilizado por base con carácter catiónico vinílico. Este nuevo complejo disileno-NHC exhibe estructuras de resonancia catiónica significativas, confirmadas por técnicas analíticas avanzadas.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Química del silicio Química del silicio
- Grupo Principal Química.
Sus antecedentes:
- Las disilinas son análogos de silicio de las alquinas, con un doble enlace silicio-silicio.
- Los carbenos N-heterocíclicos (NHC) son ligandos versátiles conocidos por estabilizar las especies reactivas.
- Los elementos del grupo pesado 14 ofrecen un enlace único y propiedades electrónicas únicas.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo complejo disileno estabilizado por base.
- Para investigar la estructura electrónica y las características de enlace de las especies catiónicas resultantes.
- Para explorar el carácter catiónico del vinilo en análogos de elementos del grupo 14 pesados.
Principales métodos:
- Reacción de un complejo disilina-NHC con el triflato de metilo (MeOTf).
- Espectroscopia de Resonancia Magnética Nuclear Multinuclear (RMN) para el análisis estructural y electrónico.
- Análisis de difracción de rayos X para determinar la estructura molecular precisa.
Principales resultados:
- Síntesis exitosa del primer análogo de elemento pesado del grupo 14 estabilizado en base con carácter catiónico vinílico (catión 2).
- Caracterización completa del catión 2 utilizando espectroscopia de RMN y difracción de rayos X.
- El análisis estructural reveló contribuciones significativas de las estructuras de resonancia catiónicas, disileno-como y sileno-como estabilizadas por NHC.
Conclusiones:
- El estudio presenta un ejemplo innovador de un análogo de cationes de vinilo estabilizado por una base (NHC) en los elementos pesados del grupo 14.
- La estructura electrónica del catión es un híbrido de múltiples formas de resonancia, destacando la unión compleja.
- Este trabajo amplía la comprensión de la unión y la reactividad en el silicio y otros compuestos de elementos del grupo pesado 14.
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