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The reactions of dialkyl and diarylethoxysilanes with T6 silsesquioxane cages: X-ray crystallographic studies of the mono-T6D1 and bis-T6D2 insertion ring expansion products

Bassindale, Alan R.; Liu, Zhihua; Parker, David J.; Taylor, Peter G.; Horton, Peter N.; Hursthouse, Michael B. and Light, Mark E. (2003). The reactions of dialkyl and diarylethoxysilanes with T6 silsesquioxane cages: X-ray crystallographic studies of the mono-T6D1 and bis-T6D2 insertion ring expansion products. Journal of Organometallic Chemistry, 687(1) pp. 1–11.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/S0022-328X(03)00622-3
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Abstract

Successful ring-expanding insertion reactions of T-6 silsesquioxane cages using dialkyl and diarylethoxysilanes have been performed to give the first reported mixed T6D1 and T6D2 silsesquioxane cages. The reactions of hexacyclohexylsilsesquioxane (T-6) with dialkyl and diaryldiethoxysilanes give predominantly T6D2 bis-insertion compounds while the reaction of T-6 with dimethylethoxysilane gives one T6D1 mono-insertion product and various T6D2 bis-insertion products as isolable components. Three of the ring-expanded products are chiral and it has been shown from their X-ray crystal structures that the pairs of enantiomers, formed as racemic mixtures, co-crystallise together. As well as comparing these structures with related ones in the literature, the possible mechanism of their formation is discussed. (C) 2003 Elsevier B.V. All rights reserved.

Item Type: Journal Article
ISSN: 0022-328X
Extra Information: Some of the scientific symbols may not appear correctly in this bibliographic record/abstract.
Keywords: T-6 silsesquioxane cage; alkoxysilane; insertion reaction; ring opening; cage expansion; X-ray study
Academic Unit/Department: Other Departments > Vice-Chancellor's Office
Item ID: 6153
Depositing User: Astrid Peterkin
Date Deposited: 05 Jan 2007
Last Modified: 24 Jul 2014 09:22
URI: http://oro.open.ac.uk/id/eprint/6153
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