biostudies-literatureUnknown68(Pt 3)Beack HJThe title 20-crown-6 unit, C(28)H(30)Br(2)O(6)·CH(2)Cl(2), consisting of three benzo groups and triethyl-ene glycol was prepared from the reaction of 1,2,4,5-tetra-kis-(bromo-meth-yl)benzene and bis-phenol in the presence of sodium hydride. In the crystal, one O atom of the central ethyl-ene glycol in the triethyl-ene glycol unit exhibits an exo conformation as a result of intra-molecular C-H⋯O hydrogen bonds. The crown unit and the solvent mol-ecule are linked by weak C-H⋯O hydrogen bonds.Acta crystallographica. Section E, Structure reports onlineo720https://www.ebi.ac.uk/biostudies/studies/S-EPMC3295491biostudies-literature6,7-Bis(bromo-meth-yl)-2,11,18,21,24,27-hexa-oxatetra-cyclo-[26.4.0.0.0]dotriaconta-1(28),4,6,8,12(17),13,15,29,31-nona-ene dichloro-methane monosolvate.PMC3295491Beack HJKim JESim WLee JYYoo SMfalse6,7-Bis(bromo-meth-yl)-2,11,18,21,24,27-hexa-oxatetra-cyclo-[26.4.0.0.0]dotriaconta-1(28),4,6,8,12(17),13,15,29,31-nona-ene dichloro-methane monosolvate.The title 20-crown-6 unit, C(28)H(30)Br(2)O(6)·CH(2)Cl(2), consisting of three benzo groups and triethyl-ene glycol was prepared from the reaction of 1,2,4,5-tetra-kis-(bromo-meth-yl)benzene and bis-phenol in the presence of sodium hydride. In the crystal, one O atom of the central ethyl-ene glycol in the triethyl-ene glycol unit exhibits an exo conformation as a result of intra-molecular C-H⋯O hydrogen bonds. The crown unit and the solvent mol-ecule are linked by weak C-H⋯O hydrogen bonds.2012-01-01T00:00:00Z2012 Mar2024-12-04T07:16:03.416Z2019-03-27T00:01:12ZS-EPMC32954912241260210.1107/S160053681200565X