5,5-Diphenyl-2-thiohydantoin

The molecular structure of the title compound, 5,5-diphenyl-2-thioxoimidazolidin-4-one, C₁₅H₁₂N₂OS, resembles that of 5,5-diphenylhydantoin (phenytoin). The C=S distance is 1.648 (2) Å. The crystal structure consists of ribbon-like infinite sheets of molecules bonded by N—H...O and N—H...S hydrogen bonds. The packing of sheets is governed by van der Waals forces only.

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