S. A. Kazoura, W. Weber
Feb 8, 1983
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0
Influential Citations
2
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The reactions of 1,3-dichlorotetramethyldisiloxane and 1,5-dichlorohexamethyltrisiloxane with alkyllithium reagents have been studied. At low temperature (− 78°C) only one of the two silicon-chlorine bonds of 1,3-dichlorotetramethyldisiloxane reacts readily with alkyllithium reagents. This permits the selective preparation of 1-alkyl-3-chlorotetramethyldisiloxanes or by hydrolysis 1-alkyl-3-hydroxytetramethyldisiloxanes. The silicon-chlorine bond of 1-alkyl-3-chlorotetramethyldisiloxanes reacts with alkyllithium reagents at higher temperatures (0°C). Both the silicon-chlorine bonds of 1,5-dichlorohexamethyltrisiloxane react competitively with alkyllithium reagents at − 78°C. No cleavage of siloxane bonds by alkyllithium reagents is observed under these conditions. Spectral properties of a number of 1-alkyl-3-hydroxytetramethyldisiloxanes and 1-alkyl-5-hydroxyhexamethyltrisiloxanes are reported.