Research Article: Guanidinium hexa­aqua­zinc(II) bis[tris­(3-carb­oxy­pyridine-2-carboxyl­ato)zincate]

Date Published: August 01, 2012

Publisher: International Union of Crystallography

Author(s): Masoumeh Tabatabaee, Zohreh Derikvand, Jafar Attar Gharamaleki.


In the title mol­ecular salt, (CH6N3)1.30[Zn(H2O)6]0.35[Zn(C7H4NO4)3]2, the ZnII atom (site symmetry 3) in the anion is coordinated by three N,O-bidentate 3-carb­oxy­pyridine-2-carboxyl­ate monoanions to generate a fac-ZnN3O3 octa­hedral coordination geometry. The guanidinium cation (the C atom has site symmetry 3) and the octa­hedral hexa­aqua­zinc(II) dication (the Zn2+ cation has site symmetry -3) are occupationally disordered in a 1.30:0.35 ratio. In the crystal, the components are linked by O—H⋯O and N—H⋯O hydrogen bonds to generate infinite (001) sheets. Weak aromatic π–π stacking [centroid–centroid distance = 3.797 (8) Å] is also observed in the crystal.

Partial Text

For related structures, see: Tabatabaee, Abbasi et al. (2011 ▶); Tabatabaee, Raza­vimahmoudabadi et al. (2011 ▶).




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