Hydrogen-bonding patterns in the cocrystal 2-amino-4,6-dimethoxy- pyrimidine-anthranilic acid (1/1)

Abstract

In the title cocrystal, C6H9N3O2·C7H7NO2, the asymmetric unit contains two crystallographically independent 2-amino-4,6-dimeth-oxy pyrimidine-anthranilic acid adducts. The 2-amino-4,6-dimeth-oxy pyrimidine mol-ecules inter-act with the carboxylic group of the respective anthranilic acid mol-ecules through N - H⋯O and O - H⋯N hydrogen bonds, forming a cyclic hydrogen-bonded motif R 2 2(8). The pyrimidine mol-ecules also form base pairs via a pair of N - H⋯N hydrogen bonds, forming another R 2 2(8) motif. The typical intra-molecular N - H⋯O hydrogen bond is observed in the anthranilic acid mol-ecules. Furthermore, the crystal structure is stabilized by C - H⋯O hydrogen bonds. © International Union of Crystallography 2008.