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Síntesis y estructuras de los sililenos heterolépticos

Cheuk-Wai So¹, Herbert W Roesky, Prabhuodeyara M Gurubasavaraj

¹Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.

Journal of the American Chemical Society

|September 12, 2007

Resumen

Se sintetizaron nuevos compuestos de silicio, derivados del tricloruro de benzamidinato de silicio. Se prepararon y caracterizaron con éxito nuevas especies de clorosileno y silileno heteroléptico, expandiendo la química del silicio.

Área de la Ciencia:

Química del organosilicio Química del organosilicio
Grupo Principal Química.
Química sintética inorgánica química sintética.

Sus antecedentes:

Los ligandos de benzamidinato ofrecen propiedades estéricas y electrónicas únicas para estabilizar especies reactivas de silicio.
Estudios anteriores han explorado los haluros de silicio, pero la síntesis de nuevos sililenos con diversos sustituyentes sigue siendo un área activa de investigación.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos compuestos de clorosileno y sileno heteroleptico derivados del tricloro de silicio benzamidinato.
Para investigar la reactividad del tricloruro de silicio benzamidinato con metales alcalinos y reactivos de organolitio.
Para explorar la diversidad estructural de estas nuevas especies de silicio a través de la cristalografía de rayos X.

Principales métodos:

Reacciones del tricloruro de silicio benzamidinato con el potasio en el tetrahidrofurano (THF).
Reacciones del tricloruro de silicio benzamidinato con reactivos de organolitio (LiR) en el THF.
Purificación y caracterización de compuestos sintetizados, incluida la cristalografía de rayos X para productos específicos.

Principales resultados:

Se obtuvieron clorosilenos mononucleares y un diclorosileno desproporcionado a partir de la reacción con potasio.
Se sintetizó una serie de compuestos de silicio con diferentes sustituyentes (NMe2, OBu, t, OPr, i, PPr, i) 2).
Se prepararon y caracterizaron con éxito nuevos sililenos heteroelépticos, con tres compuestos (4, 9 y 12) estructuralmente dilucidados por cristalografía de rayos X.

Conclusiones:

Las estrategias sintéticas empleadas permiten la preparación controlada de diversas especies de silicio con ligandos benzamidinato.
La formación de sililenos heterolépticos pone de relieve la versatilidad de estos precursores en la síntesis de organosilicones.
El análisis estructural proporciona información valiosa sobre el enlace y la geometría de estos nuevos compuestos de silicio.

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