Research Article: Poly[[hexa-μ-aqua-diaqua­bis­(μ4-dihydrogen benzene-1,2,4,5-tetra­carboxyl­ato)magnesiumdisodium] dihydrate]

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Dan Zhao, Peng Liang, Yan-Feng Li, Sen Qiu, Jun-Ran Ren.


The asymmetric unit of the title compound, {[MgNa2(C10H4O8)2(H2O)8]·2H2O}n, contains one octa­hedrally coordin­ated MgII atom (site symmetry 2/m), one octahedrally coordinated NaI atom (site symmetry 2) and one half of the dihydrogen benzene-1,2,4,5-tetra­carboxyl­ate (btec) ligand, the second half of the ligand being generated by a twofold rotation axis. The basic framework of the title compound features infinite (–Na–Na–Mg–)n chains along [10-1] with the metal cations bridged by the coordinating water molecules. The chains are isolated from each other by μ4-bridging btec ligands, which form inter­molecular O—H⋯O hydrogen bonds to uncoordinated water mol­ecules and the coordinated water mol­ecules of a neighbouring chain. In each btec ligand, there are also intramolecular O—H⋯O hydrogen bonds.

Partial Text

For structures based on the H4btec ligand, see: Gong & Zhang (2011 ▶); Liu et al. (2009 ▶, 2010 ▶); Zhang et al. (2007 ▶).




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