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Acta Cryst. (2013). E69, o658
[ doi:10.1107/S1600536813008489 ]

An orthorhombic polymorph of 3,4-diaminobenzonitrile

D. K. Geiger and D. E. Parsons

Abstract: The title compound, C7H7N3, is an orthorhombic polymorph that crystallizes in the space group Pca21. The previously reported monoclinic form [Geiger & Parsons (2013) Acta Cryst. E69, o452] crystallizes in the space group P21/c (Z = 4). In the crystal, two independent HN-H...N[triple bond]C hydrogen bonds link the molecules into chains along the a-glide plane. Two further independent HN-H...NH2 hydrogen bonds join the chains, forming a three-dimensional network.


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