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|Title:||A Unique Spherical Molecular Host with D2d Symmetry. A Novel Intramolecular Kinetic Equilibrium in Metal Ion Complexation between Two Crown Ethers|
|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[126.96.36.199]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|
|Appears in Collections:||Staff Publications|
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