8,16,24,32-Tetramethoxy[2.2.2.2]metacyclophane-1,9,17,25-tetrayne: A Novel Ionophore Having a Preorganized but Unexpectedly Flexible Cavity
- 1 August 1999
- journal article
- research article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 28 (8), 745-746
- https://doi.org/10.1246/cl.1999.745
Abstract
The title cyclophane has a preorganized cavity with about 1.2 Å in diameter surrounded by four oxygen atoms (X-ray analysis); however, solvent extraction experiments using alkali metal picrates revealed the unexpectedly flexible nature of the cavity that forms 1:1 complexes with various alkali metal ions with considerably large association constants.Keywords
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