2,9,16,19,22,25-Hexaoxatetracyclo[24.4.0.24,7.010,15]dotriaconta-1(26),4,6,10(15),11,13,27,29,31-nonaene

Abstract

The title 22-crown-6 unit, C26H28O6, comprising of three benzo groups and triethylene glycol, was prepared by the reaction of α,α′-dibromo-p-xylene with 1,8-bis(2-hydroxyphenoxy)-3,6-dioxaoctane in the presence of Cs2CO3 with tetrahydrofuran (THF) and recrystallized from dichloromethane–hexane (1:20 v/v) at room temperature. In the molecular structure, two O atoms of the central ethylene glycol in the triethylene glycol unit exhibit exo conformations due to intramolecular C—H...O interactions. A number of C—H...O and C—H...π intermolecular interactions contribute to the stabilization of the crystal packing.