4-(3-Fluoro­phen­yl)-1-(propan-2-yl­idene)thio­semicarbazone

The title compound, C(10)H(12)FN(3)S, crystallizes in the same space group (P2(1)/c) as two polymorphic forms of 4-phenyl-1-(propan-2-yl­idene)thio­semicarbazone [Jian et al. (2005). Acta Cryst. E61, o653–o654; Venkatraman et al. (2005). Acta Cryst. E61, o3914–o3916]. The arrangement of mol­ecules relative to the twofold screw axes is similar to that in the crystal structure of the lower density polymorph. In the solid state, the mol­ecular conformation is stabilized by an intra­molecular N—H⋯N hydrogen bond. The mol­ecules form centrosymmetric R (2) (2)(8) dimers in the crystal through pairs of N—H⋯S hydrogen bonds.