The reactions of dialkyl and diarylethoxysilanes with T6 silsesquioxane cages. X-ray crystallographic studies of the mono-T6D1 and bis-T6D2 insertion ring expansion products
Successful ring-expanding insertion reactions of T6 silsesquioxane cages using dialkyl and diarylethoxysilanes have been performed to give the first reported mixed T6D1 and T6D2 silsesquioxane cages.
Bassindale, Alan R.,Liu, Zhihua,Parker, David J.,Taylor, Peter G.,Horton, Peter N.,Hursthouse, Michael B.,Light, Mark E.
A higher yielding route to octasilsesquioxane cages using tetrabutylammonium fluoride, Part 2: Further synthetic advances, mechanistic investigations and X-ray crystal structure studies into the factors that determine cage geometry in the solid state
The recently-reported reaction of triethoxysilanes with tetrabutylammonium fluoride in the presence of scarce water provides a higher yielding route to substituted octasilsesquioxane cages. Further cages have now been prepared in good yield using this route and their X-ray crystal structures demonstrate that their cage geometries in the solid state are very similar with the packing constraints of the crystal lattices appearing to have the greatest influence on the geometry of the cage core. The mechanism of the reaction has been examined and the proposed mechanism of cage formation validated, though its exclusivity has not been categorically proven. By careful choice of reaction conditions, dramatic increases in rate and yield have been demonstrated.
Bassindale, Alan R.,Chen, Huiping,Liu, Zhihua,MacKinnon, Iain A.,Parker, David J.,Taylor, Peter G.,Yang, Yuxing,Light, Mark E.,Horton, Peter N.,Hursthouse, Michael B.
p. 3287 - 3300
(2007/10/03)
Controlled cleavage of R8Si8O12 frameworks: A revolutionary new method for manufacturing precursors to hybrid inorganic-organic materials
Cube-octameric polyhedral silsesquioxanes (R8Si8O12) react with strong acids (HX) to produce R8Si8O11X2 frameworks resulting from selective cleavage of one Si-O-Si linkage; subse
Feher, Frank J.,Soulivong, Daravong,Eklund, Andrew G.
p. 399 - 400
(2007/10/03)
New polyhedral oligosilsesquioxanes via the catalytic hydrogenation of aryl-containing silsesquioxanes
The hydrolytic condensation of RSiCl3 (R=benzyl, m-tolyl, 3,5-dimethylphenyl)gives good yields of the corresponding octameric aryl silsesquioxanes (1).A single-crystal X-ray diffraction study of highly soluble 1 (R-benzyl) reveals that highly efficient cr
Feher, Frank J.,Budzichowski, Theodore A.
p. 153 - 164
(2007/10/02)
More Articles about upstream products of 3809-28-7