Received 1 December 2012
The asymmetric unit of the title salt, C6H9ClN22+·2H2PO4-, contains two dihydrogenphosphate anions and one 2-chlorobenzene-1,4-diaminium dication. The H2PO4- anions are interconnected through strong O-HO hydrogen bonds to form two-dimensional infinite layers parallel to (001). The organic entities are anchored to the inorganic layers through N-HO hydrogen bonds, and through weak C-ClO halogen bonds [3.159 (2) Å, 140.48 (7)°]. No - stacking interactions between neighboring aromatic rings or C-H interactions towards them are observed. Minor disorder is observed for the Cl atom and one hydroxy group [minor-component occupancy = 3.29 (9)%].
For common applications of organic phosphate complexes, see: Masse et al. (1993). For network geometries, see: Rayes et al. (2004); Oueslati et al. (2005). For reference structural data, see: Kaabi et al. (2004); Chtioui & Jouini (2006). For halogen bonding, see: Metrangolo & Resnati (2001, 2008); Politzer et al. (2007). For van der Waals radii, see: Bondi (1964).
Data collection: APEX2 (Bruker, 2011); cell refinement: SAINT (Bruker, 2011); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) and 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: RU2048 ).
The authors acknowledge the support provided by the Secretary of State for Scientific Research and Technology of Tunisia. The diffractometer was funded by NSF grant No. 0087210, by Ohio Board of Regents grant CAP-491 and by YSU.
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