Argentina
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Novel synthesis of cyclic methylvinylsiloxanes by the reaction of methylvinyl diethoxysilane with phosphorous pentachloride
Fecha
2002-09Registro en:
Ciolino, Andrés Eduardo; Vuano, Bruno Mario; Pieroni, Olga Inés; Villar, Marcelo Armando; Valles, Enrique Marcelo; Novel synthesis of cyclic methylvinylsiloxanes by the reaction of methylvinyl diethoxysilane with phosphorous pentachloride; John Wiley & Sons Inc; Journal of Polymer Science Part A: Polymer Chemistry; 40; 18; 9-2002; 3182-3189
0887-624X
CONICET Digital
CONICET
Autor
Ciolino, Andrés Eduardo
Vuano, Bruno Mario
Pieroni, Olga Inés
Villar, Marcelo Armando
Valles, Enrique Marcelo
Resumen
We report a novel synthesis of the cyclic oligomers [(H2C = CH)(CH3)SiO]n obtained by the reaction between phosphorous pentachloride and methylvinyl diethoxysilane. According to gas chromatography/mass spectrometry data, the reaction product consisted of a mixture of cyclic oligomers in which the most important fractions were composed of cycles with n = 5, 6, or 7. The reaction product was also characterized by Fourier transform infrared and 1H and 13C NMR spectroscopy. Experimental results suggested a new kind of reaction between the phosphorous pentachloride and terminal olefins directly bonded to silicon, which was probably associated with sterical effects favoring C - O - Si bond cleavage of ethoxy groups instead of the conventional addition of phosphorous pentachloride to olefinic linkages. © 2002 Wiley Periodicals, Inc. J. Polym. Sci. Part A: Polym. Chem.