T. Popek et T. Lis, 8-HYDROXYQUINOLINE-O-SULFURIC ACID AND ITS MONOHYDRATE, Acta crystallographica. Section C, Crystal structure communications, 53, 1997, pp. 1983-1986
8-Hydroxyquinoline-O-sulfuric acid exists as a zwitterion in both its
anhydrous, C9H7NO4S, and monohydrated, C9H7NO4S.H2O, forms. In each ca
se, one of the terminal O atoms of the sulfate group is trans to the C
8 atom. The structures are stabilized by intermolecular hydrogen bonds
.