title: Dispiro[indene-2,5'-indeno[2,1-a]fluorene-6',2''-indene]-1,1'',3,3'',11',12'-hexaone: a three-dimensional hydrogen-bonded framework.
abstract: The title compound, C(36)H(16)O(6), (I), was obtained as a new and unexpected oxidation product of 1,2'-biindene-1',3,3'(2H)-trione. The molecules of (I) exhibit approximate, but noncrystallographic, twofold rotation symmetry and the central ring of the fused pentacyclic portion is distinctly puckered, with a conformation intermediate between half-chair and screw-boat. Six independent C-H...O hydrogen bonds link the molecules into a three-dimensional framework structure of considerable complexity. Comparisons are drawn between the crystal structure of (I) and those of several simpler analogues, which show wide variation in their patterns of supramolecular aggregation.
authors.affiliation: Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
authors.forename: Fabían
authors.initials: F
authors.lastname: Orozco
authors.forename: Braulio
authors.initials: B
authors.lastname: Insuasty
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
mesh_terms: D018360:Crystallography, X-Ray; D005449:Fluorenes / Q000737:chemistry*; D006586:Hexanes / Q000737:chemistry*; D006860:Hydrogen Bonding; D007192:Indenes / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D005449:Fluorenes; D006586:Hexanes; D007192:Indenes; C527949:dispiro(indene-2,5'-indeno(2,1-a)fluorene-6',2''-indene)-1,1'',3,3'',11',12'-hexaone