Research Article: Diaqua­bis­(5-carb­oxy-2-ethyl-1H-imidazole-5-carboxyl­ato-κ2N3,O4)zinc trihydrate

Date Published: June 01, 2011

Publisher: International Union of Crystallography

Author(s): Gang Zhang.


In the crystal structure of the title compound, [Zn(C7H7N2O4)2(H2O)2]·3H2O, the ZnII ion, located an inversion center, is N,O-chelated by two 5-carb­oxy-2-ethyl-1H-imidazole-4-carboxyl­ate anions and further coordinated by two water mol­ecules in a distorted octa­hedral geometry. The carb­oxy group links with the carboxyl­ate group of the same ligand via an intra­molecular O—H⋯O hydrogen bond. An extensive inter­molecular N—H⋯O and O—H⋯O hydrogen-bonded network exists in the crystal structure. One disordered lattice water mol­ecule is half-occupied and is located close to an inversion center.

Partial Text

For coordination polymers built from 2-ethyl-4,5-imidazole­dicarboxyl­ate, see: Li et al. (2011 ▶); Wang et al. (2008 ▶); Zhang et al. (2010 ▶).




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