organic compounds
The title compound, diethyl 25,26,27,28-tetrahydroxypentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(18),9,11,13 (27),15,17,19 (26),21,23-dodecaene-5,17-dicarboxylate, C34H32O8, a tetrahydroxy calix[4]arene, adopts an open-cone conformation in the solid state; this conformation is dictated by the presence of intramolecular O-HO hydrogen bonding of the phenolic OH groups [OO 2.673 (2)–2.708 (2) Å]. The planes of the aromatic rings are inclined at 120.8 (1), 133.1 (1), 118.0 (1) and 128.5 (1)° to the plane of the methylene C atoms which link them. Self-inclusion occurs when the molecules assemble in pairs about inversion centres.
Supporting information
Crystallographic Information File (CIF) | |
Structure factor file (CIF format) |
CCDC reference: 127050