Received 7 October 2012
In the crystal structure of the title molecular salt, 3C2H5N4+·HPO42-·H2PO4-·3H2O, the phosphate-based framework is built upon layers parallel to (010) made up from the H2PO4- and HPO42- anions and water molecules, which are interconnected through O-HO hydrogen bonds. The organic cations are located between the phosphate-water layers and are connected to them via N-HO hydrogen bonds. The bond-length features are consistent with an imino resonance form for the exocyclic amino group, as is commonly found for a C-N single bond involving sp2-hybridized C and N atoms.
For applications of organic phosphate complexes, see: Bringley & Rajeswaran (2006); Dai et al. (2002); Masse et al. (1993). For graph-set motifs and theory, see: Bernstein et al. (1995). For reference structural data, see: Kaabi et al. (2004); Shanmuga Sundara Raj et al. (2000). For P-OH bond lengths, see: Chtioui & Jouini (2005).
Data collection: APEX2 (Bruker, 2011); cell refinement: SAINT (Bruker, 2011); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXLE (Hübschle et al., 2011); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL and publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RU2044 ).
We would like to acknowledge the support provided by the Secretary of State for Scientific Research and Technology of Tunisia. The diffractometer was funded by NSF grant 0087210, by Ohio Board of Regents grant CAP-491, and by YSU.
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