N-S,N-O-diphenyl(thiooxamide)

The molecule of the title compound, PhNHC(==S)-C(==O)NHPh or C14H12N2OS, co nsists of two planar fragments, one of which includes the central NHC(==S)- C(==O)NH chain together with the Ph substituent on the C==O side; the secon d Ph ring, the one on the C==S side, all by itself, makes up the second pla nar fragment. Its plane is twisted about the N-C bond by 52.87 (9)degrees w ith respect to the plane of the first fragment. The C==S and C==O double bo nds adopt the transoid conformation with the torsion angle S==C-C==O equal to -179.6 (2)degrees. The molecules in the crystal are linked into centrosy mmetric dimers due to the N-H . . .O hydrogen bond involving the thioamide NH group.