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

Abstract

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.

Keywords

• crystal structure
• coordination compound
• 2-aminobenzoic acid
• diethanolamine
• Mn complex
• hydrogen bonding