Received 3 March 2009
The molecular skeleton of the title molecule, C8H6N4, is essentially planar [maximum deviation from the mean plane of 0.037 (2) Å]. All N atoms are involved in the formation of intermolecular N-HN hydrogen bonds. The crystal packing exhibits also dipole-dipole interactions between the cyano groups of neighbouring molecules [CC 3.473 (2) Å].
For details of the synthesis, see: Cheeseman (1962); Mitzel et al. (2003). For applications of diamido compounds, see: Rusanova et al. (2002); Youngblood (2006). For a related crystal structure, see: Zhang & Lu (2007).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: XP in SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV2527 ).
This work was supported by the Postdoctoral Scientific Special Foundation of China (grant No. 200801414) and the Postdoctoral Scientific Foundation of Shandong Province (grant No. 200701010).
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