[HTML version][PDF version][CIF][3d view][Structure Factors][Supplementary Material][CIF check Report][Issue contents]  [Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o1155-o1156  [ doi:10.1107/S160053681301708X ]

Pallidol hexaacetate ethyl acetate monosolvate

Q. Mao, D. K. Taylor, S. W. Ng and E. R. T. Tiekink

Abstract: The entire molecule of pallidol hexaacetate {systematic name: (±)-(4bR,5R,9bR,10R)-5,10-bis[4-(acetyloxy)phenyl]-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-1,3,6,8-tetrayl tetraacetate} is completed by the application of twofold rotational symmetry in the title ethyl acetate solvate, C40H34O12·C4H8O2. The ethyl acetate molecule was highly disordered and was treated with the SQUEEZE routine [Spek (2009). Acta Cryst. D65, 148-155]; the crystallographic data take into account the presence of the solvent. In pallidol hexaacetate, the dihedral angle between the fused five-membered rings (r.m.s. deviation = 0.100 Å) is 54.73 (6)°, indicating a significant fold in the molecule. Significant twists between residues are also evident as seen in the dihedral angle of 80.70 (5)° between the five-membered ring and the pendent benzene ring to which it is attached. Similarly, the acetate residues are twisted with respect to the benzene ring to which they are attached [C-O(carboxy)-C-C torsion angles = -70.24 (14), -114.43 (10) and -72.54 (13)°]. In the crystal, a three-dimensional architecture is sustained by C-H...O interactions which encompass channels in which the disordered ethyl acetate molecules reside.

Copyright © International Union of Crystallography
IUCr Webmaster