Crystal structure of trans-bis­(di­ethano­lamine-κ3O,N,O′)manganese(II) bis­(3-amino­benzoate)

Reaction of m-amino­benzoic acid (MABA), di­ethano­lamine (DEA) and MnCl2·4H2O led to the formation of the title salt, [Mn(C4H11NO2)2](C7H6NO2)2. In the complex cation, the Mn2+ 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 MnN2O4 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.