4115-83-7Relevant academic research and scientific papers
Fast, high-yielding syntheses of silsesquioxanes using acetonitrile as a reactive solvent
Pescarmona, Paolo P.,Van Der Waal, Jan C.,Maschmeyer, Thomas
, p. 978 - 983 (2007/10/03)
New and efficient methods for the synthesis of cyclopentyl- and cyclohexylsilsesquioxanes are described. In the case of cyclopentylsilsesquioxane, pure trisilanol (c-C5H9J 7-Si7O9(OH)3 was obtained selectively within 18 h in an isolated yield of 64%. The synthesis of cyclohexylsilsesquioxanes also gives high yields, but it is not selective towards a particular structural type [main products: (c-C6H 11)6Si6O9, (c-C6H 11J6Si6O8(OH)2, (c-C 6H11)7Si7O10OH and (c-C6H11)7Si7O9(OH) 3]. We discuss the crucial role of acetonitrile as a reactive solvent in these syntheses. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
A new route to incompletely-condensed silsesquioxanes: Base-mediated cleavage of polyhedral oligosilsesquioxanes
Feher, Frank J.,Terroba, Raquel,Ziller, Joseph W.
, p. 2309 - 2310 (2007/10/03)
Readily available R8Si8O12 frameworks react selectively with aqueous Et4NOH to afford discrete incompletely-condensed silsesquioxanes: reaction of R8Si8O12 (2a, R = c-C6/su
Base-catalyzed cleavage and homologation of polyhedral oligosilsesquioxanes
Feher, Frank J.,Terroba, Raquel,Ziller, Joseph W.
, p. 2153 - 2154 (2007/10/03)
Readily available Cy6Si6O9 2 (Cy = c-C6H11) reacts with aqueous NEt4OH in THF to afford endo-C(2h)-Cy6Si6O7(OH)4 3a, which upon further hydrolysi
Silsesquioxanes as Models for Silica Surfaces
Feher, Frank J.,Newman, David A.,Walzer, John F.
, p. 1741 - 1748 (2007/10/02)
The hydrolytic condensation of cyclohexyltrichlorosilane (CySiCl3) affords (1), (2), and (3a).Trisilanol 1 and 3b, the bis(triphenyltin) derivative of 3a, have been structurally characterized by single-crystal X-ray diffraction studies.Trisilanol 1 undergoes corner-capping reactions with trifunctional monomers (e.g., R'SiCl3, MeGeCl3, MeSnCl3), is selectively monosilylated to (6a) with chlorotrimethylsilane, and can be dehydrated to (7a).Comparison of the molecular structure of 1 with (111) β-cristobalite and (0001)β-tridymite reveals many structural similarities.Silsesquioxanes 1, 6a, and 7a are discussed as models for silica surfaces.
