Received 8 February 2013
A charge-assisted hydrogen-bonding network involving N-HO and O-HO hydrogen bonds stabilizes the crystal of the title salt, C5H8N3+·H2PO4-. The dihydrogen phosphate anions form one-dimensional chains along , via O-HO hydrogen bonds. The 2-amino-4-methylpyrimidinium cations are linked to these chains by means of two different kinds of N-HO hydrogen bonds. Neighbouring chains are linked via C-HN and C-HO hydrogen bonds forming two-dimensional slab-like networks lying parallel to (01-1).
Intriguing anion clusters formed by the supramolecular assembly of dihydrogen phosphates have been investigated recently (see: Hossain et al., 2012). Methylpyrimidine derivatives are known to be synthetic precursors to many bioactive pyrimidine derivatives (see: Xue et al., 1993). Metal complexes of pyrimidines (see: Zhu et al., 2008) and their proton transfer complexes with mineral acids are reported (see: Aakeroy et al., 2003). The infinite O-HO hydrogen-bond chain present in this material is a structural feature suggestive of possible proton conducting behaviour (see: Haile et al., 2001).
Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell refinement: CrysAlis PRO (Oxford Diffraction, 2006); data reduction: CrysAlis RED (Oxford Diffraction, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) and WinGX (Farrugia, 2012); molecular graphics: Mercury (Macrae et al., 2008); software used to prepare material for publication: PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: DS2227 ).
SPT thanks UGC for an SRF, JS thanks UGC for research funding. SPT and SJ acknowledge Professor T. N. Guru Row for his support and XRD facility at IISc.
Aakeroy, C. B., Beffert, K., Desper, J. & Elisabeth, E. (2003). Cryst. Growth Des. 3, 837-846.
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.
Haile, S. M., Boysen, D. A., Chisholm, C. R. I. & Merle, R. B. (2001). Nature, 410, 910-913.
Hossain, M. A., Muhammet, I. K., Avijit, P., Musabbir, A. S. & Frank, R. F. (2012). Cryst. Growth Des. 12, 567-571.
Macrae, C. F., Bruno, I. J., Chisholm, J. A., Edgington, P. R., McCabe, P., Pidcock, E., Rodriguez-Monge, L., Taylor, R., van de Streek, J. & Wood, P. A. (2008). J. Appl. Cryst. 41, 466-470.
Oxford Diffraction (2006). CrysAlis CCD, CrysAlis PRO and CrysAlis RED. Oxford Diffraction Ltd, Abingdon, Oxfordshire, England.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.
Xue, S. J., Zhang, A. D. & Wang, H. T. (1993). Chem. Reagents, 15, 181-182.
Zhu, W., Liu, X. & Wang, H. (2008). Acta Opt. Sin. 28, 1155-1160.