Chandrasekhar, Vadapalli ; Murugavel, Ramaswamy ; Voigt, Andreas ; Roesky, Herbert W. ; Schmidt, Hans-Georg ; Noltemeyer, Mathias (1996) Cyclic and polyhedral aluminosiloxanes with Al2Si2O4, Al4Si2O6, and Al4Si4O12 frameworks: X-ray Crystal Structures of [(2,4,6-Me3C6H2)N(SiMe3)Si(OAlBu-i)(OAl(Bu-i)2)O]2 and [(2,6-Me2C6H3)N(SiMe3)SiO3Al·C4H8O2]4 Organometallics, 15 (3). pp. 918-922. ISSN 0276-7333
Full text not available from this repository.
Official URL: http://pubs.acs.org/doi/abs/10.1021/om950685p
Related URL: http://dx.doi.org/10.1021/om950685p
Abstract
Reactions of (silylamino)silanetriols RN(SiMe3)Si(OH)3 (R = 2,4,6-Me3C6H2 (1) and 2,6-Me2C6H3 (2)) with i-Bu2AlH in 1:1 molar ratio at -78 ° C afford aluminosiloxanes [RN(SiMe3)Si(OH)O(OAlBu-i·dioxane)]2 (R = 2,4,6-Me3C6H2 (3) and 2,6-Me2C6H3 (4)) and [RN(SiMe3)Si(OAlBu-i)(OAl(Bu-i)2)O]2 (R = 2,4,6-Me3C6H2 (5) and 2,6-Me2C6H3 (6)), respectively. While 3 and 4 are eight-membered Al2Si2O4 cyclic compounds, 5 and 6 are drum-shaped aluminosiloxanes with an Al4Si2O6 core. When the same reactions were carried out in 1:2 molar ratio of the reactants at -78 ° C, only the drum-shaped polyhedral compounds 5 and 6 are isolated. The reactions between the silanetriols and i-Bu2AlH in 1:1 molar ratio at 65 °C proceed quantitatively to yield the cubic aluminosiloxanes [RN(SiMe3)SiO3Al·dioxane]4 (R = 2,4,6-Me3C6H2 (7) and 2,6-Me2C6H3 (8)) with an Al4Si4O12 framework. The X-ray crystal structures of 5 and 8 have been determined.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 8952 |
| Deposited On: | 28 Oct 2010 10:28 |
| Last Modified: | 03 Mar 2011 10:33 |
Repository Staff Only: item control page
