title: Alpha and beta phases of 4-aminoquinoline-2-carboxylic acid monohydrate.
abstract: The structures of two phases of the title compound, C10H8N2O2.H2O, are reported. While the organic molecule has very nearly the same molecular geometry in the two phases, the hydrogen-bonding patterns are quite different. In each case, however, a three-dimensional network of hydrogen bonds is formed. In the alpha phase, six N-H ... O hydrogen bonds have donor-acceptor distances ranging from 2.681 (2) to 3.206 (2) A, while three O-H...O hydrogen bonds range from 2.837 (2) to 3.173 (2) A, and in the beta phase, four N-H ... O hydrogen bonds range from 2.668 (2) to 3.038 (2) A, while two O-H...O hydrogen bonds are 2.951 (3) and 2.959 (3) A in length.
authors.affiliation: Department of Chemistry, Ohio State University, Columbus 43210, USA.
authors.forename: C J
authors.initials: CJ
authors.lastname: Burd
authors.forename: A J
authors.initials: AJ
authors.lastname: Dobson
authors.forename: R E
authors.initials: RE
authors.lastname: Gerkin
mesh_terms: D000634:Aminoquinolines / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular
chemical_list: C106720:4-aminoquinoline-2-carboxylic acid; D000634:Aminoquinolines