Heptane-1,7-diaminium dinitrate

In the title molecular salt, C7H20N22+·2NO3−, the crystal structure exhibits an unusual back-to-back paired double-stacked packing arrangement culminating in an overall double zigzag pattern of the dications. The nitrate anions form a ring around one pair of double-stacked dications. An intricate three-dimensional N—H...O and N—H...(O,O) hydrogen-bonding network exists in the crystal structure.