Crystal structure of trans-bis­(di­ethano­lamine-κ(3) O,N,O′)manganese(II) bis­(3-amino­benzoate)

Reaction of m-amino­benzoic acid (MABA), di­ethano­lamine (DEA) and MnCl(2)·4H(2)O led to the formation of the title salt, [Mn(C(4)H(11)NO(2))(2)](C(7)H(6)NO(2))(2). In the complex cation, the Mn(2+) ion is located on an inversion centre and is coordinated by two symmetry-related tridentate DEA mol­ecules, leading to the formation of a slightly distorted MnN(2)O(4) octa­hedron. The MABA(−) counter-anions are connected to the complex ion by a pair of rather strong O—H⋯O hydrogen bonds, yielding a 1:2 supra­molecular aggregate. Much weaker N—H⋯O hydrogen bonds connect neighbouring aggregates into a three-dimensional network structure.