Received 24 May 2013
aTianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
Correspondence e-mail: email@example.com
In the title salt, C12H28N2O42+·2C5H4NO2-, the 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane dication possesses inversion symmetry. In the crystal, the pyrrole-carboxylate anions are linked via pairs of N-HO hydrogen bonds, forming inversion dimers. These dimers are linked by the dications, via N-HO hydrogen bonds, forming chains propagating along .
For background to hydrogen-bonded supramolecular assemblies, see: Burrows (2004). For the hydrogen-bonded assemblies of pyrrole-based structures, see: Wang & Yin (2007); Yin & Li (2006); Cui et al. (2009); Li et al. (2012).
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FF2108 ).
We sincerely thank the Natural Science Foundation of China for financial support (NSFC No. 21172174).
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