Received 10 October 2010
aCollege of Material Science and Chemical Engineering, Jinhua College of Profession and Technology, Jinhua, Zhejiang 321017, People's Republic of China, and bMunicipal Key Laboratory of Inorganic Materials Chemistry, Institute for Solid State Chemistry, Ninbo University, Ningbo, 315211, People's Republic of China
Correspondence e-mail: email@example.com
In the complex cation of the title compound, [Mg(C10H8N2)(H2O)4](C7H4BrO2)2, the MgII atom is coordinated by two N atoms from a 2,2'-bipyridine ligand and four water O atoms in a distorted MgN2O4 octahedral geometry. The cation is located on a special position on a twofold rotation axis which passes through the MgII atom and the centroid of the 2,2'-bipyridine ligand. The 2,2'-bipyridine ligands exhibit nearly perfect coplanarity (r.m.s. deviation = 0.0035 Å) . In the crystal, O-HO and C-HO, C-HBr hydrogen bonds and - stacking interactions [mean interplanar distance of 3.475 (6) Å between adjacent 2,2'-bipyridine ligands] link the cations and anions into a three-dimensional supramolecular network. One Br atom is disordered over two sites with occupancy factors of 0.55 and 0.45.
Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002); 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: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RK2240 ).
The authors gratefully acknowledge the financial support of the Education Office of Zhejiang Province (grant No. 20051316) and the Scientific Research Fund of Ningbo University (grant No. XKL09078).
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