Received 12 May 2010
The crystal structure of the title compound, C8H9N2+·Cl-, is stabilized by N-HCl hydrogen bonds.
For background to phase transition materials, see: Li et al. (2008); Zhang et al. (2009).
Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; 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: PRPKAPPA (Ferguson, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JH2157 ).
The author is grateful to the starter fund of Southeast University for financial support to buy the X-ray diffractometer.
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Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Zhang, W., Chen, L. Z., Xiong, R. G., Nakamura, T. & Huang, S. D. (2009). J. Am. Chem. Soc. 131, 12544-12545