title: Polymorph VI of sulfapyridine: interpenetrating two- and three-dimensional hydrogen-bonded nets formed from two tautomeric forms.
abstract: Polymorph VI of 4-amino-N-(2-pyridyl)benzenesulfonamide, C(11)H(11)N(3)O(2)S, is monoclinic (space group P2(1)/n). The asymmetric unit contains two different tautomeric forms. The structure displays N-H...N and N-H...O hydrogen bonding. The two independent molecules form two separate two- and three-dimensional hydrogen-bonded networks which interpenetrate. The observed patterns of hydrogen bonding are analogous to those in polymorph I of sulfathiazole.
authors.affiliation: School of Southampton, Department of Chemistry, Highfield, Southampton, England. gelbrich@soton.ac.uk
authors.forename: Thomas
authors.initials: T
authors.lastname: Gelbrich
authors.forename: Terence L
authors.initials: TL
authors.lastname: Threlfall
authors.forename: Ann L
authors.initials: AL
authors.lastname: Bingham
authors.forename: Michael B
authors.initials: MB
authors.lastname: Hursthouse