exo-Binding of Na+ between two fused calix[4]arenes and endo binding of Na+ within the calix[4]arene cones in the disodium salt of 1,3-dimethyl ether p-tert-butylcalix[4]arene

Abstract

Reaction of 1,3-dimethyl ether p-tert-butylcalix[4]arene (H ₂ L) with sodium hydride in tetrahydrofuran affords the dimeric metallocalixarene species [Na ₂ L] ₂ which possesses a novel structure in which the Na ⁺ ions are coordinated in two very different environments.