Acta Cryst. (2008). E64, o2068  [ doi:10.1107/S1600536808031218 ]

3',6'-Bis(diethylamino)-3H-spiro[2-benzothiophene-1,9'-xanthene]-3-thione

B.-Y. Su, X.-Q. Zhan, J.-N. Guo, Y.-F. Zhou and H. Zheng

Abstract: The title compound, C₂₈H₃₀N₂OS₂, was obtained by thionation of 3',6'-bis(diethylamino)-3H-spiro[isobenzofuran-1,9'-xanthene]-3-one with 2,4-bis(p-methoxyphenyl)-1,3-dithiadiphosphetane disulfide (Lawesson's reagent). The planes of the two benzene rings of the xanthene system are inclined at a dihedral angle of 17.4 (1)°, and the plane of the dithiophthalide group and the planes through the two benzene rings of the xanthene system make dihedral angles of 80.2 (1) and 82.8 (1)°, respectively.

Online 4 October 2008

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