Abstract
First example of X-ray diffraction analysis of the crystal structure of calix[4]pyrogallolarene is reported. The compound was prepared by acid-catalyzed condensation of pyrogallol with propionaldehyde in a water-alcohol medium, and it gave rise to a system of “host-guest” type. Calixarene molecules in a cone conformation are packed in molecular layers; therewith each “host” molecule contains an ethanol molecule in the cavity. Hydroxy groups, ethanol and water molecules form a hydrophilic layer between two layers; as a result arises an endless bilayer structure.
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