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A Highly Effective Strategy for Encapsulating Potassium Cations in Small Crown Ether Rings on a Dinuclear Palladium Complex
Author(s) -
LucioMartínez Fátima,
Bermúdez Brais,
Ortigueira Juan M.,
Adams Harry,
Fernández Alberto,
Pereira M. Teresa,
Vila José M.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201700597
Subject(s) - crown ether , moiety , palladium , chemistry , potassium , ether , metallacycle , ring (chemistry) , molecule , polymer chemistry , crown (dentistry) , combinatorial chemistry , stereochemistry , organic chemistry , materials science , x ray crystallography , catalysis , ion , physics , diffraction , optics , composite material
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.