title: 3,3'-[(1RS,3SR)-2-oxocyclohexane-1,3-diyl]bis[(3RS,3'SR)-3-hydroxyindolin-2-one] dihydrate: organic layers of R2(2)(8), R2(2)(16) and R6(6)(40) rings linked by tetrameric water aggregates.
abstract: The organic component of the title compound, C22H20N2O5·2H2O, exhibits approximate but noncrystallographic mirror symmetry. The molecules of the organic component are linked by a combination of one O-H...O hydrogen bond and two N-H···O hydrogen bonds to form sheets containing R2(2)(8), R2(2)(16) and R6(6)(40) rings. These sheets are linked into a continuous three-dimensional framework structure by cyclic centrosymmetric R4(2)(8) water tetramers. Comparisons are made with some simpler analogues.
authors.affiliation: Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
authors.forename: Diana
authors.initials: D
authors.lastname: Becerra
authors.forename: Braulio
authors.initials: B
authors.lastname: Insuasty
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007093:Imidazoles / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D014867:Water / Q000737:chemistry
chemical_list: C587350:3,3'-((1RS,3SR)-2-oxocyclohexane-1,3-diyl)bis((3RS,3'SR)-3-hydroxyindolin-2-one)dihydrate; D007093:Imidazoles; D007211:Indoles; D014867:Water
keywords: crystal structure; cyclic water tetramers; hydrogen bonding