Research Article: N1,N1-Dimethyl­propane-1,2-diaminium bis­(6-carb­oxy­pyridine-2-carboxyl­ate) monohydrate

Date Published: April 01, 2011

Publisher: International Union of Crystallography

Author(s): Hossein Aghabozorg, Mahsa Foroughian, Alireza Foroumadi, Giuseppe Bruno, Hadi Amiri Rudbari.


The asymmetric unit of the title proton-transfer compound, C5H16N22+·2C7H4NO4−·H2O, consists of two mono-deproton­ated pyridine-2,6-dicarb­oxy­lic acid mol­ecules as anions, viz. (py-2,6-dcH)−, one diprotonated N1,N1-dimethyl­propane-1,2-diamine mol­ecule as a cation, viz. (dmpdaH2)2+, and one water mol­ecule. The crystal packing shows extensive O—H⋯O, N—H⋯O, N—H⋯N and O—H⋯N and weak inter­molecular C—H⋯O hydrogen bonds. These inter­actions link the (dmpdaH2)2+ cation, the (py-2,6-dcH)− anions and water mol­ecule and play an important role in the stabilization of crystal packing.

Partial Text

For background to proton-transfer compounds, see: Aghabozorg et al. (2008 ▶). For related structures, see: Aghabozorg, Bayan et al. (2011 ▶); Aghabozorg, Mofidi Rouchi et al. (2011 ▶); Aghabozorg, Saemi et al. (2011 ▶); Sharif et al. (2010 ▶).




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