Siloxanes from the hydrolysis of isopropyltrimethoxysilane
摘要:
The behavior of isopropyltrimethoxysilane (1) in the presence one equivalent of water and a dibutyltin dilaurate catalyst has been investigated. Under these conditions, partial hydrolysis of the methoxy groups of 1 occurred, followed by condensation reactions leading to the formation of low molecular-weight oligomers. Disiloxane 4, trisiloxane 6 and cyclic siloxanes 7 and 8 have been isolated and fully characterized. Transient reaction intermediates silanol 3 and hydroxydisiloxane 5 have been characterized spectroscopically, The time evolution of these species was followed by gas chromatography and Si-29 NMR. A reaction scheme for the hydrolytic condensation of 1 is proposed to accommodate these results.
CARRE, FRANCIS;CORRIU, ROBERT J. P.;GUERIN, CHRISTIAN;HENNER, BERNARD J. +, ORGANOMETALLICS, 8,(1989) N, C. 313-323
作者:CARRE, FRANCIS、CORRIU, ROBERT J. P.、GUERIN, CHRISTIAN、HENNER, BERNARD J. +
DOI:——
日期:——
Cyclic Tetrasiloxanetetraols: Formation, Isolation, and Characterization
作者:Ryuichi Ito、Yuriko Kakihana、Yusuke Kawakami
DOI:10.1246/cl.2009.364
日期:2009.4.5
Hydrolysis of trialkoxysilanes having various substituents gave cyclic tetrasiloxanetetraols with all-cis isomer as the major fraction in the presence of equimolar amounts of water and sodium hydroxide. All stereoisomers of phenyl derivative were produced by isomerization of the all-cis isomer in the presence of hydrochloric acid, and isolated and identified.
Siloxanes from the hydrolysis of isopropyltrimethoxysilane
作者:Jack K. Crandall、Christophe Morel-Fourrier
DOI:10.1016/0022-328x(94)05159-9
日期:1995.3
The behavior of isopropyltrimethoxysilane (1) in the presence one equivalent of water and a dibutyltin dilaurate catalyst has been investigated. Under these conditions, partial hydrolysis of the methoxy groups of 1 occurred, followed by condensation reactions leading to the formation of low molecular-weight oligomers. Disiloxane 4, trisiloxane 6 and cyclic siloxanes 7 and 8 have been isolated and fully characterized. Transient reaction intermediates silanol 3 and hydroxydisiloxane 5 have been characterized spectroscopically, The time evolution of these species was followed by gas chromatography and Si-29 NMR. A reaction scheme for the hydrolytic condensation of 1 is proposed to accommodate these results.