coordination bonds. After acid treatment, Li-T7 undergoes lithium–proton cationic exchange, yielding hepta(i-butyl)silsesquioxane trisilanol (2; H-T7) quantitatively. The high yield of H-T7 seems to be influenced by Li–O bonding in the Li-T7 complex that affects the selective formation of hepta(i-butyl)silsesquioxane trisilanolate and the bulky i-butyl groups which may prevent decomposition or SQ cage-rearrangement
Cubic octasilsesquioxanes with mixed substituents were directly synthesized through a sol–gel process using the mixture of i-butyl(triethoxysilane) and other alkoxysilanes.
Synthesis of polyhedral phenylsilsesquioxanes with KF as the source of the fluoride ion
作者:Matjaž Koželj、Boris Orel
DOI:10.1039/b804224a
日期:——
preparation of polyhedral phenylsilsesquioxanes is reported. Phenylsilsesquioxane resin and freshly hydrolysed phenyltrimethoxysilane was refluxed with various phase-transfer catalysts and potassium fluoride in toluene yielding octaphenylsilsesquioxane, or in a mixture of THF and ethanol yielding dodecaphenylsilsesquioxane.
[DE] OLIGOMERE SILASESQUIOXANE, VERFAHREN ZU DEREN HERSTELLUNG UND VERWENDUNG<br/>[EN] OLIGOMER SILASESQUIOXANES, METHOD FOR THE PRODUCTION THEREOF, AND USE OF THE SAME<br/>[FR] SILASESQUIOXANES OLIGOMERES, PROCEDE DE FABRICATION DE CEUX-CI ET UTILISATION
申请人:CREAVIS TECH & INNOVATION GMBH
公开号:WO2004063207A1
公开(公告)日:2004-07-29
Die Erfindung betrifft ein Verfahren zur Herstellung vollständig kondensierter oligomerer Silasesquioxane der Formel R1aR2bR3cR4dR5eR6fR7gR8hSi8O12 mit R1, R2, R3, R4, R5, R6, R7, R8 = gleiche oder ungleiche, substituierte oder unsubstituierte Alkyl-, Cycloalkyl-, Alkenyl-, Cycloalkenyl-, Alkinyl-, Cycloalkinyl-, Aryl-, Heteroarylreste oder Wasserstoff und a + b + c + d + e + f + g + h = 8 und der Struktur 1 1sowie deren Verwendung für die Synthese von nicht vollständig kondensierten Silasesquioxanen, von funktionalisierten Silasesquioxanen, von Katalysatoren und deren Ausgangsverbindungen sowie für die Synthese und Modifizierung von Polymeren.
该发明涉及一种制备完全缩合的寡聚硅氧烷的方法,其化学式为R1aR2bR3cR4dR5eR6fR7gR8hSi8O12,其中R1、R2、R3、R4、R5、R6、R7、R8 = 相同或不同的取代或未取代的烷基、环烷基、烯基、环烯基、炔基、环炔基、芳基、杂环芳基残基或氢,a + b + c + d + e + f + g + h = 8,并具有结构1。该方法还涉及使用该硅氧烷合成不完全缩合的硅氧烷、官能化硅氧烷、催化剂及其起始化合物以及合成和改性聚合物。
[EN] N-HETEROCYCLIC-CARBENE-MEDIATED PREPARATION OF POLYHEDRAL SILSESQUIOXANES<br/>[FR] PRÉPARATION À MÉDIATION PAR UN CARBÈNE N-HÉTÉROCYCLIQUE DE SILSESQUIOXANES POLYÉDRIQUES
申请人:KEMIJSKI INST
公开号:WO2013184076A1
公开(公告)日:2013-12-12
An organocatalytic method for a preparation of polyhedral silsesquioxanes characterized by use of N-heterocyclic carbenes, NHC, as organocatalysts, is described in present invention. Stable, isolable NHCs or their precursors that are called also cryptocarbenes could be used in disclosed process. Polyhedral silsesquioxanes could be prepared from hydrolyzates of functional trialkoxysilanes, silsesquioxane resins or from other already existing polyhedral silsesquioxanes compounds by mixing them with an organocatalytic NHC in an organic solvent at an appropriate temperature. Because of excellent solubility of carbenes in a reaction media high yields of polyhedral silsesquioxanes are obtained even at a concentration of NHC lower than 1 mol %.