title: 1,4-Methano-11a-methyl-4,4a,11,11a-tetrahydro-1H-benzo[b]fluoren-11-one.
abstract: The title compound, C(19)H(16)O, crystallizes with two molecules of opposite chirality in the asymmetric unit. In both molecules, the naphthalene and cyclopentanone moieties are individually planar. The two cyclopentane rings adopt envelope conformations, while the cyclohexane ring adopts a boat conformation.
authors.affiliation: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: A
authors.initials: A
authors.lastname: Usman
authors.forename: I A
authors.initials: IA
authors.lastname: Razak
authors.forename: S
authors.initials: S
authors.lastname: Chantrapromma
authors.forename: S K
authors.initials: SK
authors.lastname: Ghorai
authors.forename: D
authors.initials: D
authors.lastname: Mal
authors.forename: H K
authors.initials: HK
authors.lastname: Fun
authors.forename: G D
authors.initials: GD
authors.lastname: Nigam
mesh_terms: D003374:Coumarins / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005449:Fluorenes / Q000737:chemistry*; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: C438266:1,4-methano-11a-methyl-4,4a,11,11a,tetrahydro-1H-benzo(b)fluoren-11-one; D003374:Coumarins; D005449:Fluorenes