Muhammad, Sohail; Bassindale, Alan R.; Taylor, Peter G.; Male, Louise; Coles, Simon and Hursthouse, Michael B.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1021/om1009318|
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A series of binuclear pentacoordinate silicon complexes of diketopiperazine have been synthesized and substituent (leaving group) effects on the Si-O bond coordination have been studied by comparison of the five differently substituted analogous structures (X = F, Cl, OTf, Br, and I). Variable-temperature NMR spectroscopy supported by X-ray crystallography shows, for the first time in binuclear pentacoordinate silicon complexes, a complex equilibrium with both nonionic (O-Si) and ionic (Si-X) dissociation of the axial bonds in the silicon-centered trigonal bipyramids. The two dissociation pathways are consistent with a model for nucleophilic substitution in a binuclear pentacoordinate silicon compound at the silicon atom.
|Item Type:||Journal Article|
|Copyright Holders:||2011 American Chemical Society|
|Academic Unit/Department:||Other Departments > Vice-Chancellor's Office
Science > Life, Health and Chemical Sciences
|Interdisciplinary Research Centre:||Biomedical Research Network (BRN)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
|Depositing User:||Peter Taylor|
|Date Deposited:||20 Jan 2012 09:33|
|Last Modified:||24 Nov 2014 12:13|
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