Publication: Unprecedented formation of cis- and trans-di[(3-chloropropyl) isopropoxysilyl]-bridged double-decker octaphenylsilsesquioxanes
Issued Date
2013-07-01
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ISSN
10990682
14341948
14341948
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2-s2.0-84879451548
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Mahidol University
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SCOPUS
Bibliographic Citation
European Journal of Inorganic Chemistry. No.19 (2013), 3292-3296
Suggested Citation
Vuthichai Ervithayasuporn, Rapheepraew Sodkhomkhum, Thapong Teerawatananond, Chuttree Phurat, Pranee Phinyocheep, Ekasith Somsook, Tanakorn Osotchan Unprecedented formation of cis- and trans-di[(3-chloropropyl) isopropoxysilyl]-bridged double-decker octaphenylsilsesquioxanes. European Journal of Inorganic Chemistry. No.19 (2013), 3292-3296. doi:10.1002/ejic.201300283 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/31525
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Title
Unprecedented formation of cis- and trans-di[(3-chloropropyl) isopropoxysilyl]-bridged double-decker octaphenylsilsesquioxanes
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Abstract
Silsesquioxane formation competing with the deprotonation of alcohol solvents in the presence of a strong base to form alkoxides is reported for the first time. Evidently, sodium isopropoxide is formed during the synthesis of the sodium salt of a double-decker octaphenylsilsesquioxane tetrasilanolate in 2-propanol as the solvent, which leads to the formation of unexpected cis- and trans-di[(3-chloropropyl)isopropoxysilyl]-bridged double-decker octaphenylsilsesquioxanes after in situ coupling with 3- chloropropyltrichlorosilane. The desired products were characterized by 1H NMR, 13C NMR, and 29Si NMR spectroscopy; ESI-MS; and single-crystal X-ray diffraction. During the synthesis of the sodium salt of double-decker octaphenylsilsesquioxane tetrasilanolate in 2-propanol, sodium isopropoxide is formed, which leads to the formation of unexpected cis- and trans-di[(3-chloropropyl)isopropoxysilyl]-bridged double-decker octaphenylsilsesquioxanes after in situ coupling with 3- chloropropyltrichlorosilane. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.