title: Glyoxal 4-nitrophenylhydrazone: triple helices linked into a three-dimensional channel structure.
abstract: The molecules of the title compound, C8H7N3O3, which are nearly planar, are linked by an N-H...O hydrogen bond into helical chains, three of which are required to define the structure completely. These triply intertwined helices are linked by a C-H...O hydrogen bond into a three-dimensional framework enclosing two distinct types of channel, with average cross-sectional areas of 15.0 and 8.2 A2.
authors.affiliation: School of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland.
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell