A Unique Spherical Molecular Host with D2d Symmetry. A Novel Intramolecular Kinetic Equilibrium in Metal Ion Complexation between Two Crown Ethers

Please use this identifier to cite or link to this item: https://doi.org/10.1021/ol026780t

Title:	A Unique Spherical Molecular Host with D2d Symmetry. A Novel Intramolecular Kinetic Equilibrium in Metal Ion Complexation between Two Crown Ethers
Authors:	Xu, J. Lai, Y.-H. He, C.
Issue Date:	31-Oct-2002
Citation:	Xu, J., Lai, Y.-H., He, C. (2002-10-31). A Unique Spherical Molecular Host with D2d Symmetry. A Novel Intramolecular Kinetic Equilibrium in Metal Ion Complexation between Two Crown Ethers. Organic Letters 4 (22) : 3911-3914. ScholarBank@NUS Repository. https://doi.org/10.1021/ol026780t
Abstract:	(Matrix Presented) A spherical host with D2d symmetry consisting of a tetrathia[3.3.3.3]paracyclophane and two 18-crown-6 moieties was synthesized. Its crystal structure shows a central cavity with a diameter of 1.96 Å and a depth of 6.75 Å. A Na+ ion could rest in the cavity center but prefers core binding to external binding in one of the crown units. An intramolecular kinetic equilibrium was reached with the Na+ ion switching between the two crown units with an energy barrier of 14.1 ± 3 kcal/mol.
Source Title:	Organic Letters
URI:	http://scholarbank.nus.edu.sg/handle/10635/93030
ISSN:	15237060
DOI:	10.1021/ol026780t
Appears in Collections:	Staff Publications

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