Ethane-1,2-diammonium dibromide: A redetermination at 100 K

In the redetermined [for the previous study, see Søtofte (1976). Acta Chem. Scand. Ser. A, 30, 309-311] crystal structure of the title compound, C₂H₁₀N₂ ²⁺·2Br^-, the H atoms have been located and the hydrogen-bonding scheme is described. The ethane-1,2-diammonium cation lies over a crystallographic inversion centre and straddles a crystallographic mirror plane with the C and N atoms in special positions. In the crystal, the cations and anions are linked by N-H⋯Br and N-H⋯(Br,Br) hydrogen bonds, which generate various ring and chain motifs including an R₁₀⁵(32) loop.