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. 2013 Mar 1;69(Pt 3):o442.
doi: 10.1107/S1600536813000299. Epub 2013 Feb 23.

(3E)-11,16-Dioxatricyclo-[15.4.0.0(5,10)]henicosa-1(21),3,5,7,9,17,19-heptaen-2-one

Gnanavelu Ganesh  1 , Santhanagopalan Purushothaman, Piskala Subburaman Kannan, Raghavachary Raghunathan, Arunachalathevar Subbiahpandi
Affiliations

(3E)-11,16-Dioxatricyclo-[15.4.0.0(5,10)]henicosa-1(21),3,5,7,9,17,19-heptaen-2-one

Gnanavelu Ganesh et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The title compound, C19H18O3, crystallizes with three mol-ecules (A, B and C) in the asymmetric unit. The carbonyl O atom shows positional disorder over two sites in mol-ecules A and B; the site-occupancy ratios are 0.76 (3):0.24 (3) and 0.86 (3):0.14 (3), respectively. The ethyl-ene fragments in each mol-ecule have an E conformation, while the C-O-C-C torsion angles indicate near planarity. The dihedral angles formed by the aromatic rings are 20.0 (1), 23.7 (1) and 16.1 (1)° for mol-ecules A, B and C, respectively. Intra-molecular C-H⋯O hydrogen bonds occur in each mol-ecule.

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Figures

Fig. 1.
Fig. 1.
The structure of the title compound, showing the atom-numbering scheme. The displacement ellipsoids are drawn at the 30% probability level.
See this image and copyright information in PMC

References

    1. Anh, L. T., Hieu, T. H., Soldatenkov, A. T., Soldatova, S. A. & Khrustalev, V. N. (2011). Acta Cryst. E67, o1128–o1129. - PMC - PubMed
    1. Bhat, B. A., Dhar, K. L., Puri, S. C., Saxena, A. K., Shanmugavel, M. & Qazi, G. N. (2005). Bioorg. Med. Chem. Lett. 15, 3177–3180. - PubMed
    1. Bruker. (2008). APEX2 and SAINT and SADABS Bruker AXS Inc., Madison, Wisconsin, USA.
    1. Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854.
    1. Lee, Y. S., Lim, S. S., Shin, K. H., Kim, Y. S., Ohuchi, K. & Jung, S. H. (2006). Biol. Pharm. Bull. 29, 1028–1031. - PubMed