POLYHEDRAL ALUMINOSILSESQUIOXANES AS MODELS FOR ALUMINOSILICATES - UNIQUE SYNTHESIS OF ANIONIC AL/SI/O FRAMEWORKS

An efficient procedure for the synthesis of polyhedral aluminosilsesquioxanes has been developed and applied to the synthesis of 7, an anionic aluminosilsesquioxane that is formally derived from two corner-sharing D4R subunits of Linde type A zeolite. The salient feature of this procedure is the use of tetramethylstibonium siloxides as mild sources of siloxide anions. Tetramethylstibonium siloxides can be prepared from silanols by using standard means or from the oxidation of hydridosilsesquioxanes with Me3NO. © 1990, American Chemical Society. All rights reserved.