Received 19 February 2013
The title solvated salt, C21H17N72+·SO42-·CH3OH, was obtained when we attempted to prepare the complex of ferrous sulfate and 2,6-bis[3-(pyridin-2-yl)-1H-pyrazol-1-yl]pyridine in methanol. The dihedral angles between adjacent pyridine and pyrazole rings range from 3.8 (1) to 13.4 (1)°. An intramolecular N-HN hydrogen bond occurs. In the crystal, N-HO and O-HN hydrogen bonds between solvent methanol molecules and the cations generate zigzag chains along .
For general background to the chemistry of oligapyridine ligands, see: Constable et al. (1988, 1992, 1997); Fu, Li et al. (1996); Fu, Sun et al. (1996). For the synthesis of the ligand, see: Jameson & Goldsby (1990).
Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: KJ2223 ).
The authors acknowledge financial support by the Natural Science Foundation of China (grant No. 21271129).
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