A Double Calix[4]arene in a 1,3‐<i>alternate</i> Conformation

Abstract

Tightly packed infinite zeolite-like tubes with an inner diameter of 4.1 – 4.5 Å are formed by the novel double calixarene in the solid state (see schematic representation of the crystal structure on the right). In solution, the calixarene binds Ag1 cations, both at the ends and inside the cylindrical cavity.