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From simple rings to one-dimensional channels with calix[8]arenes, water clusters, and alkali metal ions

Bergougnant, Rémi D. ; Robin, Adeline Y. ; Fromm, Katharina M.

In: Tetrahedron, 2007, vol. 63, no. 44, p. 10751-10757

The macrocycle 4-tert-butylcalix[8]arene (L) was reacted with alkali metal carbonates (Li₂CO₃, Na₂CO₃, K₂CO₃, Rb₂CO₃, and Cs₂CO₃) at the interface of a biphasic THF/water system. Needle-like crystals with a general formula [Ax(4-tert-butylcalix[8]arene-xH)(THF)y(H₂O)z] (with A=Li, Na, K, Rb, Cs,...