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6,7-Bis(bromoÂmethÂyl)-2,11,18,21,24,27-hexaÂoxatetraÂcycloÂ[26.4.0.04,9.012,17]dotriaconta-1(28),4,6,8,12(17),13,15,29,31-nonaÂene dichloroÂmethane monosolvate
The title 20-crown-6 unit, C28H30Br2O6·CH2Cl2, consisting of three benzo groups and triethylÂene glycol was prepared from the reaction of 1,2,4,5-tetraÂkisÂ(bromoÂmethÂyl)benzene and bisÂphenol in the presence of sodium hydride. In the crystal, one O atom of the central ethylÂene glycol in the triethylÂene glycol unit exhibits an exo conformation as a result of intraÂmolecular C—H⋯O hydrogen bonds. The crown unit and the solvent molÂecule are linked by weak C—H⋯O hydrogen bonds