Received 25 February 2013
The asymmetric unit of the title compound, C9H9ClN4, contains two molecules. In the crystal, the molecules are ordered in a chain-like fashion along the a axis, and form layers offset relative to the C plane by approximately 30°. This ordering does not, however, appear to be directed by classical hydrogen bonding.The allylic side chains of both independent molecules are disordered, with occupancies of 0.870 (4) and 0.934 (3) for the major components. The disorder components represent two possible spatial orientations of the atoms around the C=C double bond.
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2004) and ChemBioDraw Ultra (CambridgeSoft, 2009); software used to prepare material for publication: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LR2100 ).
We acknowledge the support from the Norwegian Research Council (KOSK II, project 184929 and RENERGI, project 190980) and from the Department of Chemistry, UiO. We also acknowledge Dr David S. Wragg for invaluable assistance with the refinement.
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