Synthesis and Crystal Structure of Di-p-bromobenezenesulfonyl-macluraxanthone

The title compound was synthesized and characterized by single crystal X-ray diffraction. The compound crystallizes in the triclinic space group P1; a = 7.4092(5), b = 13.9154(11), c = 16.9139(11)A, α = 101.576(4), β = 95.892(4) and γ = 99.859(4)°, V = 1666.1(2)A3, Z = 2 and Dx = 1.661 g cm-3. In the molecular structure, the xanthene ring system is essentially planar and the chromene ring adopts a screw boat conformation. The 1,1-dimethyl-2-propenyl substituent is planarly attached to the attached benzene ring whereas the two p-bromobenzenesulfonyl groups are bisectionally and axially attached to the attached benzene ring. O-H…O intramolecular hydrogen bonds were observed in the molecular structure. In the crystal packing, the molecules are linked by weak C-H…O intermolecular interactions forming chains along the c-axis. The crystal structure is stabilized by intramolecular O-H…O hydrogen bond and weak C-H…O intra-and intermolecular interactions.