title: 4,5-Dichloro-2H-1,3-oxazine-2,6(3H)-dione.
abstract: In the title compound, C(4)HCl(2)NO(3), the essentially planar (maximum deviation = 0.023 Å for the ring O atom) mol-ecules form N-H⋯O hydrogen bonds between mol-ecules lying about inversion centers, forming eight-membered rings with an R(2) (2)(8) motif in graph-set notation.
authors.affiliation: Department of Chemistry, Bucknell University, Lewisburg, PA 17837, USA.
authors.forename: Damon
authors.initials: D
authors.lastname: Parrish
authors.forename: Brian
authors.initials: B
authors.lastname: Glass
authors.forename: Gretchen M
authors.initials: GM
authors.lastname: Rehberg
authors.forename: Margaret E
authors.initials: ME
authors.lastname: Kastner