Acta Cryst. (2006). E62, o1160-o1162  [ doi:10.1107/S1600536806006295 ]

Bis(3-ammoniopropyl)ethylenediaminium bis(squarate)

H. Pasaoglu and O. O. Yilan

Abstract: In the crystal structure of the title compound, C₈H₂₆N₄⁴⁺·2C₄O₄^2-, the bis(3-ammoniopropyl)ethylenediaminium (PAED) cation lies on an inversion centre and the squarate anion (Sq^2-) is in a general position. Salt formation occurs by donation of four H atoms from two squaric acid molecules to the bis(3-aminopropyl)ethylenediamine base. In the crystal structure, the strongest interactions are between H atoms of NH₂⁺ groups and squarate O atoms. All the H atoms of NH₃⁺ groups of the PAED cation also participate in hydrogen bonding with the O atoms of the Sq^2- anion, contributing to the crystal packing.

Online 24 February 2006

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