Bassindale, Alan R.; Liu, Zhihua; Parker, David J.; Taylor, Peter G.; Horton, Peter N.; Hursthouse, Michael B. and Light, Mark E.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1016/S0022-328X(03)00622-3|
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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|
|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
|Depositing User:||Astrid Peterkin|
|Date Deposited:||05 Jan 2007|
|Last Modified:||14 Jan 2016 16:21|
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