Crystal structure of 1-(4-formyl­benzyl­idene)thio­semicarbazone

The asymmetric unit of the title compound, C(9)H(9)N(3)OS, contains two approximately planar mol­ecules (r.m.s. deviations for 14 non-H atoms = 0.094 and 0.045 Å), with different conformations. In one of them, the C=O group is syn to the S atom and in the other it is anti. Each mol­ecule features an intra­molecular N—H⋯N hydrogen bond, which generates an S(5) ring. In the crystal, mol­ecules are linked by N—H⋯O and N—H⋯S hydrogen bonds, generating discrete networks; the syn mol­ecules form [010] chains and the anti mol­ecules form (100) sheets.