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6881212 
Journal Article 
3 ',6 '-Bis(diethylamino)-3H-spiro[2-benzothiophene-1,9 '-xanthene]-3-thione 
Su, BY; Zhan, XinQi; Guo, JNan; Zhou, YueF; Zheng, H; , 
2008 
Acta Crystallographica Section E-Crystallographic Communications
ISSN: 2056-9890 
INT UNION CRYSTALLOGRAPHY 
CHESTER 
O2068-U1468 
21580934 
WOS:000260607800126 
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)degrees, 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)degrees, respectively.