Muhammad, Sohail; Bassindale, Alan R.; Taylor, Peter G.; Male, Louise; Coles, Simon and Hursthouse, Michael B.
(2011).
| DOI (Digital Object Identifier) Link: | http://dx.doi.org/doi:10.1021/om1009318 |
|---|---|
| Google Scholar: | Look up in Google Scholar |
Abstract
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 |
| ISSN: | 0276-7333 |
| Academic Unit/Department: | Other Departments > Other Departments Science > Life, Health and Chemical Sciences |
| Item ID: | 31213 |
| Depositing User: | Peter Taylor |
| Date Deposited: | 20 Jan 2012 09:33 |
| Last Modified: | 05 Nov 2012 17:05 |
| URI: | http://oro.open.ac.uk/id/eprint/31213 |
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