A new route to incompletely-condensed silsesquioxanes: base-mediated cleavage of polyhedral oligosilsesquioxanes

Authors
Feher, FJ Terroba, R Ziller, JW
Citation
Fj. Feher et al., A new route to incompletely-condensed silsesquioxanes: base-mediated cleavage of polyhedral oligosilsesquioxanes, CHEM COMMUN, (22), 1999, pp. 2309-2310
Citations number
22
Categorie Soggetti
Chemistry
Journal title
CHEMICAL COMMUNICATIONS
ISSN journal
13597345 → ACNP
Issue
22
Year of publication
1999
Pages
2309 - 2310
Database
ISI
SICI code
1359-7345(1999):22<2309:ANRTIS>2.0.ZU;2-2
Abstract
Readily available R8Si8O12 frameworks react selectively with aqueous Et4NOH to afford discrete incompletely-condensed silsesquioxanes: reaction of R8S i8O12 (2a, R = c-C6H11; 2b, R = Bu-i) with Et4NOH first produces endo-D-2-R 8Si8O11(OH)(2) (3a, R = c-C6H11; 3b, R = Bu-i), which reacts further with E t4NOH to produce endo-C-2-R8Si8O10(OH)(4) (5a and 5b) and endo-C-3-R7Si7O9( OH)(3) (4a, R = c-C6H11; 4b, R = Bu-i); the reactions of Et4NOH with Me8Si8 O12 (2c), (c-C6H11)(7)(H)Si8O12 (2d) and (c-C6H11)(7)(OH)Si8O12 (2d) also p roduce the corresponding trisilanols (i.e. endo-C-3-R7Si7O9(OH)(3) (4a, R = c-C6H11; 4c, R = Me).