摘要
The hydro-thermal reaction of benzene-1,4-dicarboxylic acid and 4,4′-trimethyl-ene dipiperidine leads to the formation of the title compound, C 13 H 28 N 2 2+ ·C 8 H 4 O 4 2- . The anion is located on a center of inversion whereas the cation is positioned on a twofold rotation axis. In the crystal structure, the anions and cations are linked by N- H⋯O and N- H⋯(O,O) hydrogen bonds.