Research Article: Poly[tetra­aqua­(μ6-9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carboxyl­ato)dimanganese(II)]

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Rui Xu, Jian-Lan Liu.

http://doi.org/10.1107/S1600536812027158

Abstract

The title complex, [Mn2(C18H4O10)(H2O)4]n, was synthesized from manganese(II) chloride tetra­hydrate and 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carb­oxy­lic acid (H4AQTC) in water. The anthraquinone unit is located about a crystallographic center of inversion. Each asymmetric unit therefore contains one MnII atom, two water ligands and one half AQTC4− anion. The MnII atom is coordinated in a distorted octa­hedral geometry by four O atoms from three AQTC4− ligands and two water O atoms. Two of the carboxyl­ate groups coordinate one MnII atom in a chelating mode, whereas the others each coordinate two MnII atoms. Each AQTC4− tetra-anion therefore coordinates six different MnII ions and, as a result, a three-dimensional coordination polymer is formed. O—H⋯O hydrogen bonds, some of them bifurcated, between water ligands and neighboring water or anthraquinone ligands are observed in the crystal structure.

Partial Text

For general background to metal-organic frameworks, see: Li et al. (1999 ▶, 2012 ▶); Cheng et al. (2010 ▶); Hong et al. (2009 ▶); Miller & Gatteschi (2011 ▶); Liu et al. (2010 ▶).

 

Source:

http://doi.org/10.1107/S1600536812027158

 

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