In the quinolone ring system of the title compound, C15H10Cl3NO, the p
yridone moiety assumes a slightly twisted boat conformation. The plane
of the benzene ring is twisted at an angle of 11.9(1)degrees with res
pect to the pyridone ring, indicating the slight non-planarity of the
system. The molecules are stabilized by NH H...O-type hydrogen bonds i
n addition to van der Waals interactions.