title: 7,14-Bis(4-bromo-phen-yl)-2,11,11-trimethyl-1,4,10,12-tetra-oxa-dispiro-[4.2.5.2]penta-decane-9,13-dione.
abstract: In the mol-ecule of the title compound, C(26)H(26)Br(2)O(6), the cyclo-hexane 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 inter-molecular C-H⋯O inter-actions link the mol-ecules into centrosymmetric dimers, forming R(2) (2)(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).
authors.forename: Ju-Hua
authors.initials: JH
authors.lastname: Peng
authors.forename: Ning
authors.initials: N
authors.lastname: Ma
authors.forename: Ge
authors.initials: G
authors.lastname: Zhang