Octakis[(2,2,6,6-tetramethylpiperidino)methyl]octasilsesquioxane: synthesis and crystal structure analysis of a new aminoorganyl-functionalized octasilsesquioxane

摘要

Octakis [(2,2,6,6-tetramethylpiperidino)methyl] octasilsesquioxane (1), an aminoorganyl-functionalized octasilsesquioxane, was synthesized by hydrolysis of bis[ethane-1,2-diolato(2-)][(2,2,6,6-tetramethylpiperidinio)methyl]silicat e (2). The zwitterionic pentacoordinate silicate 2 was obtained by treatment of dimethoxy(methyl)[(2,2,6,6-tetramethylpiperidino)methyl]silane (3) with two molar equivalents of ethane- 1,2-diol. The cage-Eke compound 1 was structurally characterized by single-crystal X-ray diffraction and solution and solid-state NMR spectroscopy. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 19]