2-Aminoterephthalic acid N, N-dimethylformamide disolvate

The asymmetric unit of the title structure, C8H7NO4 center dot 2C(3)H(7)NO, contains one 2-aminoterephthalic acid and two N, N-dimethylformamide molecules. Strong O - H center dot center dot center dot O hydrogen bonds between the acidic carboxy H atoms of 2-aminoterephthalic acid and the O atoms of both solvent molecules form linear 1: 2 complex units. One H atom of the amine group is involved in intramolecular N - H center dot center dot center dot O hydrogen bonding, whereas the second one takes part in an intermolecular N - H center dot center dot center dot O connection. Furthermore, the crystal is stabilized by weak C - H center dot center dot center dot O hydrogen bonds.