A Highly Effective Strategy for Encapsulating Potassium Cations in Small Crown Ether Rings on a Dinuclear Palladium Complex

The potential of 15‐crown‐5 ethers to link large cations, such as potassium, is limited by the quasi‐parallel arrangement of two oxygen donor moieties upon appropriate orientation of the corresponding ether‐ring‐containing molecules. Substrates bearing the two crown ethers that are capable of achiev...

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Bibliographic Details
Published in:Chemistry : a European journal 2017-05, Vol.23 (26), p.6255-6258
Main Authors: Lucio‐Martínez, Fátima, Bermúdez, Brais, Ortigueira, Juan M., Adams, Harry, Fernández, Alberto, Pereira, M. Teresa, Vila, José M.
Format: Article
Language:English
Subjects:
Cations
Chemical bonds
Chemistry
crown compounds
Crown ethers
Ethers
metallacycles
Palladium
Phenyls
Potassium
sandwich complexes
Substrates
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Summary:The potential of 15‐crown‐5 ethers to link large cations, such as potassium, is limited by the quasi‐parallel arrangement of two oxygen donor moieties upon appropriate orientation of the corresponding ether‐ring‐containing molecules. Substrates bearing the two crown ethers that are capable of achieving such coordination are hitherto unknown. The synthesis and isolation of a tailor‐made dinuclear palladacycle bearing 15‐crown‐5 ether rings on the metallated phenyls offers such a possibility, providing the adequate environment for the formation of the sandwiched [K(metallacycle‐15‐crown‐5)2] moiety. This synthetic strategy also culminates in the isolation of the first palladacycle able to entrap a potassium cation through bonding to two 15‐crown‐5 ether rings in a single molecule. A doubly 15‐crown‐5 ether‐functionalised palladacycle is extremely efficient for achieving potassium coordination through a sandwich assembly. A strategy was devised for the synthesis of a homobimetallic phosphine‐bridged palladium organometallic complex, which comprises two oxygen donor moieties within one molecule in a quasi‐parallel orientation of the 15‐crown‐ether rings.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201700597