Research Article: Diaqua­[5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxyl­ato)]cobalt(II)

Date Published: June 01, 2011

Publisher: International Union of Crystallography

Author(s): Ying Wang, Xin-Lian Gao.


In the title complex, [Co(C12H8N4O8)(H2O)2], the CoII atom is coordinated by two N and two O atoms of the tetra­dentate 5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxy­l­ate) anion. The slightly distorted octa­hedral coordination environment is completed by the O atoms of two water mol­ecules in axial positions. An intra­molecular O—H⋯O hydrogen bond between the carb­oxy and carboxyl­ate groups stabilizes the mol­ecular configuration. Adjacent mol­ecules are linked through O—H⋯O and N—H⋯O hydrogen bonds between the carb­oxy/carboxyl­ate groups, water mol­ecules and imidazole fragments into a three-dimensional network.

Partial Text

For background to complexes based on 1H-imidazole-4,5-dicarb­oxy­lic acid and its derivatives, see: Das et al. (2010 ▶); Sun et al. (2010 ▶); Zhang et al. (2010 ▶).




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