Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 695, Issue 6, Pages 898-902Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2010.01.013
Keywords
Trialkoxysilane; Sodium hydroxide; Cyclic tetrasiloxane tetraol; Benzyltrimethylammonium hydroxide; Octahedral octaphenylsilsesquioxane; Scrambling
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Funding
- Japan Society for the Promotion of Science [16205016]
- Ministry of Education, Science, Sports, Culture and Technology, Japan [18039012]
- Grants-in-Aid for Scientific Research [18039012, 16205016] Funding Source: KAKEN
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Cage octasilsesquioxane with various substituents were obtained by the condensation reaction of various all-cis cyclic tetrasiloxanetetraol (R-T-4-tetraol, R = phenyl, p-tolyl, i-butyl, naphthyl) with benzyltrimethylammonium hydroxide or tetrabutylammonium fluoride as a catalyst. Co-condensation of phenyl-T-4-tetraol with phenyl-d(5)-T-4-tetraol or with p-tolyl-T-4-tetraol were found to proceed through reshuffling process evidenced by scrambling of the substituents. Pure octa(4-bromo-substituted phenyl)octasilsesquioxane was synthesized for the first time from tetra(4-bromo-substituted phenyl)tetrasiloxanetetraol sodium salt. (C) 2010 Elsevier B.V. All rights reserved.
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