Received 29 January 2011
In the title compound, (C6H14N2)[Mg(H2O)6](SO4)2, the MgII ion, lying on an inversion center, is coordinated by six water molecules in a slightly distorted octahedral geometry. The 1,4-diazoniabicyclo[2.2.2]octane cation is located about a twofold rotation axis. Intermolecular N-HO and O-HO hydrogen bonds link the cations and the anions into a three-dimensional network.
Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HY2403 ).
This work was supported by a start-up grant from Southeast University, China.
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