Bis(9-amino-acridinium) bis-(pyridine-2,6-dicarboxyl-ato-κO,N,O)manganate(II) trihydrate.

The asymmetric unit of the title compound, (C(13)H(11)N(2))(2)[Mn(C(7)H(3)NO(4))(2)]·3H(2)O, consists of a discrete mononuclear [Mn(2,6-pydc)(2)](2-) anionic complex (2,6-pydc is pyridine-2,6-dicarboxyl-ate) associated with two 9-amino-acridinium counter-ions for neutralization of charge and three uncoordin-ated water mol-ecules. The Mn(II) atom is six-coordinated by (2,6-pydc)(2-) anions in a tridentate fashion and is at the centre of a distorted octa-hedron formed by the MnO(4)N(2) bonding set. In the crystal, various inter-molecular inter-actions between different moieties can be found, such as different kinds of hydrogen bonds, offset or slipped π-π [centroid-centroid distances in the range 3.3704 (12) to 3.8674 (13)Å] and C=O⋯π [3.563 Å] inter-actions, which lead to the formation of a three-dimensional supra-molecular network.