Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 12 (December 2012)

organic compounds

Acta Cryst. (2012). E68, o3363-o3364    [ doi:10.1107/S1600536812046363 ]


S. K. Mohamed, M. Akkurt, M. N. Tahir, A. A. Abdelhamid and A. A. Marzouk

Abstract: The asymmetric unit of the title compound, C34H16O5, contains two independent mol­ecules (A and B) with similar conformations. The two benzene rings attached to the nine-membered ring are inclined to one another at 63.62 (14)° in mol­ecule A and 68.23 (12)° in mol­ecule B. One intra­moleculer C-H...O hydrogen bond occurs in mol­ecule A and two are observed in mol­ecule B. In the crystal, mol­ecules are linked by weak C-H...O hydrogen bonds, forming a three-dimensional network structure with R22(10) and R22(24) ring motifs. Aromatic [pi]-[pi] stacking interactions [centroid-centroid distances = 3.7572 (19), 3.6996 (19) and 3.7043 (19) Å] are also observed. The unit cell contains a pair of voids of 37 (2) Å3 about an inversion centre but the residual electron density (highest peak = 0.19 e Å-3 and deepest hole = -0.20 e Å-3) in the difference Fourier map suggests that no solvent mol­ecule occupies this void.

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