Received 8 May 2013
In the title salt, C7H8N3+·BF4-, the 1,2,4-triazolo[4,3-a]pyridinium cation is planar [maximum deviation of 0.016 (2) Å for all non-H atoms]. The cation and anion constitute a tight ionic pair with an FN [2.911 (4) Å] intermolecular attractive interaction. The ionic pairs form dimers via stacking interactions between inversion-related cations, the normal distance between the cation planes being 3.376 (5) Å. The dimers are packed in stacks along the a axis and linked via C-HF hydrogen bond, forming a three-dimensional network.
For catalytic applications of triazoliums, see: Fisher et al. (2006); Enders et al. (2006); Wurz et al. (2012). For the synthesis of a related compound and for related structures, see: Ma et al. (2008); Wei et al. (2009).
Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: KQ2005 ).
The authors are grateful to the Key Program of the Education Department of Sichuan Province (No. 13ZA0232), the Key Project of Luzhou Medical College (No. 2012ZD-01), the Program for New Century Excellent Talents in University (NCET-10-0945), the Key Project of the Chinese Ministry of Education (No. 211160) and the Scientific Fund of Sichuan Province for Outstanding Young Scientists (No. 2009-26-417) for financial support.
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Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Wei, S., Liu, B., Zhao, D., Wang, Z., Wu, J., Lan, J. & You, J. (2009). Org. Biomol. Chem. 7, 4241-4247.
Wurz, N. E., Daniliuc, C. G. & Glorius, F. (2012). Chem. Eur. J. 18, 16297-16301.