Received 13 November 2012
In the crystal structure of the title compound, C5H6ClN3, molecules are linked by pairs of N-HN hydrogen bonds, forming inversion dimers. These dimers are linked via N-HN hydrogen bonds, forming a two-dimensional network lying parallel to (100). Inversion-related molecules are also linked via a slipped - interaction, with a centroid-centroid distance of 3.5259 (11) Å, a normal separation of 3.4365 (7) Å and a slippage of 0.789 Å.
The title compound is an important organic intermediate which has been used to synthesise a drug that has shown promising activity against, for example, inflammatory bowel disease. For the synthetic procedure, see: Graceffa et al. (2010). For bond-length data, see: Allen et al. (1987).
Data collection: CAD-4 Software (Enraf-Nonius, 1985); cell refinement: CAD-4 Software; data reduction: XCAD4 (Harms & Wocadlo,1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2530 ).
The authors thank the Center of Testing and Analysis, Nanjing University, for the data collection.
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