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Acta Cryst. (2009). E65, o1151  [ doi:10.1107/S1600536809014251 ]

7,14-Bis(4-bromophenyl)-2,11,11-trimethyl-1,4,10,12-tetraoxadispiro[4.2.5.2]pentadecane-9,13-dione

J. Peng, N. Ma and G. Zhang

Abstract: In the molecule of the title compound, C26H26Br2O6, the cyclohexane ring is in a chair conformation, while the five-membered and 1,3-dioxane rings both adopt envelope conformations. The dihedral angle between the benzene rings is 77.21 (3)°. In the crystal structure, weak intermolecular C-H...O interactions link the molecules into centrosymmetric dimers, forming R22(14) ring motifs. One of the Br atoms, the methyl C and H atoms, and the C atom bonded to the methyl group of the five-membered ring are disordered over two positions. The Br atoms were refined with occupancies of 0.51 (4) and 0.49 (4), while the C and H atoms were refined with occupancies of 0.320 (18) and 0.680 (18).

Online 30 April 2009


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