title: Redetermination of 6-amino-5-formyl-1,3-dimethyluracil monohydrate at 120 K: a polarized molecular structure and two interwoven hydrogen-bonded frameworks.
abstract: The title compound [systematic name: 6-amino-5-formyl-1,3-dimethylpyrimidine-2,4(1H,3H)-dione monohydrate], C(7)H(9)N(3)O(3).H(2)O, has been reexamined at 120 K. The improved precision of the intramolecular dimensions provides evidence for a polarized molecular-electronic structure, and the molecular components are linked by one N-H...O and two O-H...O hydrogen bonds into two interwoven three-dimensional frameworks, which are weakly linked by the longer component of a three-centre N-H...(O)(2) hydrogen bond.
authors.affiliation: Departamento de Química Inorgánica y Orgánica, Universidad de Jaén, 23071 Jaén, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: de la Torre
authors.forename: Manuel
authors.initials: M
authors.lastname: Nogueras
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell