Unprecedented Formation of cis ‐ and trans ‐Di[(3‐chloropropyl)isopropoxysilyl]‐Bridged Double‐Decker Octaphenylsilsesquioxanes

Autor:	Vuthichai Ervithayasuporn, Chuttree Phurat, Tanakorn Osotchan, Pranee Phinyocheep, Thapong Teerawatananond, Ekasith Somsook, Rapheepraew Sodkhomkhum
Rok vydání:	2013
Předmět:	Inorganic Chemistry Solvent chemistry.chemical_compound Deprotonation chemistry Main group element Polymer chemistry Proton NMR Nuclear magnetic resonance spectroscopy Carbon-13 NMR Photochemistry Cis–trans isomerism Silsesquioxane
Zdroj:	European Journal of Inorganic Chemistry. 2013:3292-3296
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.201300283
Popis:	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.
Databáze:	OpenAIRE
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