Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 11 (November 2013)


organic compounds



rk2415 scheme

Acta Cryst. (2013). E69, o1643-o1644    [ doi:10.1107/S1600536813027475 ]

N,N'-Bis(2-amino­benz­yl)ethane-1,2-diaminium dinitrate

L. Á. Garza Rodríguez, P. Elizondo Martínez, S. Bernès, B. Nájera Martínez and N. Pérez Rodríguez

Abstract: In the title salt, C16H24N42+·2NO3-, both the cation and anion are placed in general positions, although the cation displays non-crystallographic inversion symmetry, with the aliphatic chain extended in an all-trans conformation. The benzene rings are almost parallel, with a dihedral angle between their mean planes of 3.3 (6)°. The nitrate ions are placed in the vicinity of the protonated amine groups, forming efficient N-H...O inter-ion hydrogen bonds. Each nitrate ion in the asymmetric unit bridges two symmetry-related cations, forming an R44(18) ring, a common motif in organic ammonium nitrate salts. This results in the formation of chains along [010] with alternating cations and anions. The neutral amine groups are involved in slightly weaker N-H...O hydrogen bonds with the nitrate O atoms, and there are also a number of C-H...O hydrogen bonds present. The resulting supra­molecular structure is based on a two-dimensional network extending in the ab plane.


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