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.
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 ▶).