CRYSTAL-STRUCTURE OF SODIUM 4-AMINOCINNOLINE-3-CARBOXYLATE TETRAHYDRATE

Crystal structure of the title compound has been determined by X-ray m ethod to the final R factor of 0.058 and compared in detail with simil ar structures from Cambridge Structural Database. It is composed of fl at 4-aminocinnoline-3-carboxylate anions and disodium decahydrate dica tions domains expanded in [010] direction and joint by a complicated s ystem of hydrogen bonds. A strong intramolecular hydrogen bond between amine and carboxy groups roughly maintains coplanarity of the groups with aromatic cinnoline system.