Dimeric resorcinarene salt capsules with very tight encapsulation of anions and guest molecules

Abstract

Crystallization of N-cyclohexyl ammonium resorcinarene triflate from methanol results in a dimeric capsule capable of trapping two triflate anions and two methanol molecules within a 341 ų cavity while with 1,4-dioxane as a guest it forms a new larger dimeric capsule with volume of 679 ų encapsulating four 1,4-dioxane and four water molecules, resulting in packing coefficients of 0.75 and 0.67, respectively.