Synthesis of Monomeric and Dimeric Siloxanes Derived of β-Aminoalcohols
Elizabeth Gómez,* Guadalupe Contreras-Ordóñez and Rubén A. Toscano
Instituto de Química, Universidad Nacional Autónoma de México. Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, México, D. F. México. elgomez@correo.unam.mx, Fax: +52 55-56162217.
Recibido el 27 de abril del 2006; ]]> Aceptado el 11 de agosto del 2006.
Abstract
The preparation and structural characterization of dimeric and monomeric siloxanes are described. The silicon complexes were obtained from β-amino alcohols and dichlorodimethylsilane, bisdimethylaminodimethylsilane and diphenyldichlorosilane. The complexes were characterized by 1H, 13C and 29Si NMR spectroscopy and mass spectrometry. The X-ray crystallography study for one compound confirmed the formation of a sixteen-membered heterocycle.
Key words: Siloxanes, 29Si NMR, X-ray crystallography, aminoalcohols.
Resumen
En este trabajo se describe la preparación y la caracterización de siloxanos diméricos y monoméricos. Los complejos de silicio se obtuvieron por reacción de β-amino alcoholes con diclorodimetilsilano, bisdimetilaminodimetilsilano y diclorodifenilsilano. Los complejos se caracterizaron por RMN de 1H, 13C y 29Si, y espectrometría de masas. La estructura molecular de un anillo de 16 miembros para uno de los compuestos se confirmó por difracción de rayos-X.
Palabras clave: Siloxanos, RMN de 29Si, Difracción de rayos-X, aminoalcoholes.
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Acknowledgements
The authors thank Francisco Javier Pérez and Luis Velasco for their valuable collaboration in recording mass spectra. DGAPA UNAM for the financial support (IN207103).
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