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Propane-1,2-diaminium bis­(pyridine-2,6-dicarboxyl­ato-κ3 O 2,N,O 6)cadmate dihydrate

By Hossein Aghabozorg, Zeynab Khazaie, Ali Akbar Agah, Maryam Saemi and Behrouz Notash


The reaction of cadmium nitrate dihydrate, propane-1,2-diamine and pyridine-2,6-dicarb­oxy­lic acid in a 1:1:2 molar ratio in an aqueous solution resulted in the formation of the title compound, (C3H12N2)[Cd(C7H3NO4)2]·2H2O or (p-1,2-daH2)-[Cd(pydc)2]·2H2O (where p-1,2-da is propane-1,2-diamine and pydcH2 is pyridine-2,6-dicarb­oxy­lic acid). The CdII ion is coordinated by four O and two N atoms of two pydc ligands in a distorted octa­hedral environment. The structure also contains two uncoordinated water mol­ecules. In the crystal, there are several inter­molecular N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds. There are also π–π stacking inter­actions between the pyridine rings of pydc units, with centroid–centroid distances of 3.4708 (16) Å

Topics: Metal-Organic Papers
Publisher: International Union of Crystallography
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Provided by: PubMed Central

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  1. Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) x y z Uiso*/Ueq
  2. (2011). metal-organic compounds m982 Aghabozorg et al. doi:10.1107/S160053681102438X Acta Cryst.
  3. The packing diagram of the title compound showing π-π interactions between pydc fragments.Only anionic parts are shown for clarity. Propane-1,2-diaminium bis(pyridine-2,6-dicarboxylato- κ3O2,N,O6)cadmate dihydrate Crystal data