Received 1 September 2010
The asymmetric unit of the title compound, 3C5H6ClN2+·3C8H5O4-·C8H6O4, contains three independent 2-amino-5-chloropyridinium cations, three independent hydrogen phthalate anions and one phthalic acid molecule. In the crystal structure, there are two kinds of supramolecular tapes. One is formed by two independent cations with two anions through N-HO and C-HO hydrogen bonds. Another one is formed by the other cation and anion, and the phthalic acid molecule via N-HO, O-HO and C-HO hydrogen bonds. These two tapes are connected by an O-HO hydrogen bond, forming a double-tape structure.
For details of hydrogen bonding, see: Jeffery (1997). For details of structures incorporating phthalic acid, see: Dale et al. (2004); Ballabh et al. (2005). For hydrogen-bond motifs, see: Bernstein et al. (1995). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS2597 ).
MH and HKF thank the Malaysian Government and Universiti Sains Malaysia for the Research University grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a post-doctoral research fellowship.
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