Bis(9-amino-acridinium) bis-(pyridine-2,6-dicarboxyl-ato)cuprate(II) trihydrate.

The asymmetric unit of the title compound, (C(13)H(11)N(2))(2)[Cu(C(7)H(3)NO(4))(2)]·3H(2)O or (9-aminoAcr)[Cu(pydc)(2)]·3H(2)O, contains a Cu(pydc)(2) (pydc = pyridine-2,6-dicarboxyl-ate) anion, two protonated 9-amino-acridine (9-aminoAcr)(+) counter-ions and three uncoordinated water mol-ecules. The anion contains a six-coordinated Cu(II) atom within a distorted octa-hedral geometry. Non-covalent inter-actions i.e. N-H⋯O and O-H⋯O hydrogen bonds and inter-molecular π-π contacts between the pyridine rings [centroid-centroid distance = 3.7773†(13)†à ] and acridine rings [centroid-centroid distance = 3.4897†(13), 3.7784†(14) and 3.8627†(15)†à ] result in the formation of a three-dimensional network.