10-HYDROXYBENZO[H]QUINOLINE

The crystal structure of 10-hydroxybenzo[h]quinoline, C13H9NO, has bee n determined. The asymmetric part of the unit cell comprises two almos t planar molecules. A strong intramolecular O-H ... N hydrogen bond cl oses the six-membered ring. The geometrical features of the molecule s uggest that it can be regarded as a 2-phenylpyridine with a fused doub le bond. In the crystal structure there are alternate layers of the tw o symmetry-independent molecules.