Find in Library

The asymmetric unit of the title compound, C19H18N4O2·0.25H2O, contains two organic molecules and a solvent water molecule with 50% occupancy. The two molecules differ in their conformations: in one molecule it is (+)gauche-trans-trans-(+)gauche-trans, whereas in the other it is (−)gauche-trans-trans-(−)gauche-trans. The dihedral angles between the pyridine ring and the quinoline ring system are 67.4 (3) and 68.0 (2)°. Molecules are linked into a supramolecular two-dimensional array via N—H...N hydrogen bonds, with each partially occupied water molecule connected via an O—H...O hydrogen bond. C—H...O interactions are also present.