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2-(4-Fluorobenzylidene)propanedinitrile: monoclinic polymorph

Author(s): Ahmed M. El-Agrody | Mohamed A. Al-Omar | Abd El-Galil E. Amr | Seik Weng Ng | Edward R. T. Tiekink

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 69;
Issue: 4;
Start page: o515;
Date: 2013;
Original page

The title compound, C10H5FN2, is a monoclinic (P21/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.

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