ChemInform Abstract: THE FORMATION OF POLYHEDRAL ETHYLSILSESQUIOXANES IN THE PROCESS OF OLIGOETHYLHYDROCYCLOSILOXANE POLYCONDENSATION

Abstract

Die Umsetzung einer 9: 1‐Mischung der Cyclosiloxane (Ia) und (Ib) in Diethylether mit einer l%igen methanolischen Kaliumhydroxidlösung führt zu Gemischen, die bis zu 24 verschiedene Oligoethylsilsesquioxane enthalten.

A New, Efficient Route to Titanium-Silsesquioxane Epoxidation Catalysts Developed by Using High-Speed Experimentation Techniques

“…[10,12] Among those factors, the solvent and the nature of the organic group R are known to play a predominant role. Both the solvent and the R group influence the kinetic rate constant and the solubility of intermediates and products.…”

Synthesis and preliminary characterization of octakis (chloropropyldimethylsiloxy) octasilsesquioxane

“…Octakis (hydridodimethylsiloxy) octasilsesquioxane (2) was synthesized in a two-step reaction, by following approximately the literature 11 .The Fig. 1 shows a scheme for the synthesis of these composites.…”

Coupling of Silsesquioxane Cages in the Coordination Sphere of Erbium

“…[1,2,5,6] Incompletely condensed silsesquioxanes such as (c-C 6 H 11 ) 7 Si 7 O 9 (OH) 3 (1) share far-reaching structural similarities with β-tridymite and β-cristobalite and are thus quite realistic models for the silanol sites on silica surfaces. [1,2,[6][7][8][9][10][11] Metal complexes derived from 1 are therefore commonly regarded as "realistic" models for industrially important metal catalysts immobilized on silica surfaces. [1,2,7] The "Periodic Table of Metallasilsesquioxanes" [1b] already covers numerous metallic elements ranging from alkali metals [1,12,13] through early [1,[14][15][16][17][18] and late transition metals [1,[19][20][21][22] to the lanthanide elements.…”

“…[2] With respect to catalysis research the chemistry of metallasilsesquioxanes also receives considerable current interest. [1,2,5,6] Incompletely condensed silsesquioxanes such as (c-C 6 H 11 ) 7 Si 7 O 9 (OH) 3 (1) share far-reaching structural similarities with β-tridymite and β-cristobalite and are thus quite realistic models for the silanol sites on silica surfaces. [1,2,[6][7][8][9][10][11] Metal complexes derived from 1 are therefore commonly regarded as "realistic" models for industrially important metal catalysts immobilized on silica surfaces.…”