Crystal And Molecular-Structure Of Dihydro-8(B),8(C)-Diphenyl-1h,3h,4h,5h,7h,8h,-2,6-Dioxa-3a,4a,7a,8a-Tetr Aazacyclopenta[Def]Fluorene-4,8-Dithione

The title compound C20H18N4O2S2 crystallizes in the monoclinic space group P2(1)/n with a = 8.4930(1) Angstrom, b = 11.4880(1) Angstrom, c = 20.0709(2) Angstrom, beta = 94.933(1)degrees, V = 1951.01(3) Angstrom(3), Z = 4. The crystal structure has been solved by vector search methods and refined by full-matrix least-squares to R = 0.04 for 2888 reflections and 116 restraints. The title compound has a suitable geometry for synthesizing receptor molecules with a cleft for selective complexation.