Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 5 (May 2013)

organic compounds

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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