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Complejos de molibdeno Eta3-silapropargil/alquinylsilil: síntesis, estructura y reactividad hacia el metanol
Mako Yabe-Yoshida1, Chizuko Kabuto, Kuninobu Kabuto
1Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
Journal of the American Chemical Society
|June 13, 2009
Resumen
Se sintetizaron nuevos complejos organometálicos con ligandos de eta(3)-silapropargyl. Estos complejos se someten a reacciones con el metanol para formar metaciclos y complejos de alilo, expandiendo la química del organosilicon.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Química del silicio Química del silicio
- Coordinación Química de la Coordinación
Sus antecedentes:
- La síntesis de nuevos compuestos organometálicos es crucial para el desarrollo de nuevas aplicaciones catalíticas y materiales.
- Los compuestos orgánicos de silicio ofrecen propiedades únicas debido a las características del átomo de silicio.
Objetivo del estudio:
- Para sintetizar y caracterizar los nuevos complejos eta(3)-silapropargil y alquinylsilyl de molibdeno.
- Para investigar la reactividad de estos nuevos complejos con el metanol.
Principales métodos:
- Síntesis de los complejos eta(3)-silapropargyl/alquinylsilyl a través de las reacciones de Cp*(CO)(2)(MeCN)MoMe con los alquinylsilanos.
- Caracterización estructural utilizando espectroscopia de RMN y cristalografía de rayos X. Caracterización estructural utilizando espectroscopia de RMN y cristalografía de rayos X. Caracterización estructural utilizando espectroscopia de RMN y cristalografía de rayos X. Caracterización estructural utilizando espectroscopia de RMN y cristalografía de rayos X. Caracterización estructural utilizando espectroscopia de RMN y cristalografía de rayos X.
- Estudios de reactividad que involucran reacciones con metanol.
Principales resultados:
- Se han sintetizado con éxito nuevos complejos eta(3)-silapropargyl/alquinylsilyl Cp*(CO)(2)Mo(eta(3)-Ph(2)SiCCR) (3a, R = (t) Bu; 3b, R = (i) Pr).
- El complejo 3a reaccionó con el metanol para producir un ciclo metálico estable de cuatro miembros Cp*(CO)(2)MoC(=CH(t)Bu)SiPh(2)OMe (5a).
- El complejo 3b reaccionó con el metanol para formar un complejo eta(3)-alilo Cp*(CO)(2)Mo{eta(3)-(MeOPh(2)Si)HCCHCMe(2)} (7) a través de un ciclo metálico intermedio (5b).
Conclusiones:
- El estudio demuestra la síntesis y caracterización exitosas de nuevos complejos organosilicio-molibdeno.
- Los estudios de reactividad revelan vías distintas para la formación de complejos metaciclo y eta(3) -alilo en reacción con el metanol.
- Estos hallazgos contribuyen a la comprensión de la química del silicio orgánico y al desarrollo de nuevas transformaciones organometálicas.
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