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K⁺···Cπ and K⁺···F Non-Covalent Interactions in π-Functionalized Potassium Fluoroalkoxides Roşca, Sorin-Claudiu; Roueindeji, Hanieh; Dorcet, Vincent; Roisnel, Thierry; Carpentier, Jean-François; Sarazin, Yann
Abstract
Secondary interactions stabilize coordinatively demanding complexes of s-block metals. The structures of potassium fluoroalkoxides that, in addition to intra- and intermolecular K⁺···F contacts, also exhibit K⁺···Cπ interactions with tethered π ligands, are reported. A potassium–arene, a rare potassium–alkyne, and a potassium–olefin complex have been prepared by deprotonation of functionalized α,α-bis(trifluoromethyl)alcohols with KN(SiMe₂R)₂. They all feature a cuboid K₄O₄ core with µ³-bridging O atoms, and multiple stabilizing K⁺···F contacts in the range 2.71–3.33 Å. The potassium–arene complex shows η², η³, and η⁶ K⁺···Cπ(arene) interactions in the range 3.35–3.47 Å. The potassium–alkyne and potassium–olefin compounds are stabilized by η² interactions with the unsaturated carbon–carbon bond, in the range 3.17–3.49 Å and 3.15–3.19 Å, respectively. Comparison with the parent complex devoid of a flanking π ligand illustrates the role of K⁺···Cπ interactions.
Item Metadata
| Title |
K⁺···Cπ and K⁺···F Non-Covalent Interactions in π-Functionalized Potassium Fluoroalkoxides
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| Creator | |
| Publisher |
Multidisciplinary Digital Publishing Institute
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| Date Issued |
2017-03-07
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| Description |
Secondary interactions stabilize coordinatively demanding complexes of s-block metals.
The structures of potassium fluoroalkoxides that, in addition to intra- and intermolecular K⁺···F contacts, also exhibit K⁺···Cπ interactions with tethered π ligands, are reported. A potassium–arene, a rare potassium–alkyne, and a potassium–olefin complex have been prepared by deprotonation of functionalized α,α-bis(trifluoromethyl)alcohols with KN(SiMe₂R)₂. They all feature a cuboid K₄O₄ core with µ³-bridging O atoms, and multiple stabilizing K⁺···F contacts in the range 2.71–3.33 Å. The potassium–arene complex shows η², η³, and η⁶ K⁺···Cπ(arene) interactions in the range 3.35–3.47 Å.
The potassium–alkyne and potassium–olefin compounds are stabilized by η² interactions with the unsaturated carbon–carbon bond, in the range 3.17–3.49 Å and 3.15–3.19 Å, respectively. Comparison with the parent complex devoid of a flanking π ligand illustrates the role of K⁺···Cπ interactions.
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| Subject | |
| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2019-06-10
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
CC BY 4.0
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| DOI |
10.14288/1.0379378
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| URI | |
| Affiliation | |
| Citation |
Inorganics 5 (1): 13 (2017)
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| Publisher DOI |
10.3390/inorganics5010013
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| Peer Review Status |
Reviewed
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| Scholarly Level |
Faculty
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| Rights URI | |
| Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
CC BY 4.0