2-(4-Fluoro­benzyl­idene)propane­dinitrile: monoclinic polymorph

The title compound, C(10)H(5)FN(2), is a monoclinic (P2(1)/c) polymorph of the previously reported triclinic (P-1) form [Anti­pin et al. (2003 ▶). J. Mol. Struct. 650, 1–20]. The 13 non-H atoms in the title polymorph are almost coplanar (r.m.s. deviation = 0.020 Å); a small twist between the fluoro­benzene and dinitrile groups [C—C—C—C torsion angle = 175.49 (16)°] is evident in the triclinic polymorph. In the crystal, C—H⋯N inter­actions lead to supra­molecular layers parallel to (-101); these are connected by C—F⋯π inter­actions.