title: endo-3,3-Dimethyl-4-oxobicyclo-[3.1.0]hexan-2-yl methane-sulfonate.
abstract: The relative configuration of the endo isomer of the title compound, C(9)H(14)O(4)S, has been established and the conformation of the diastereoisomer is discussed. The five-membered ring adopts an envelope conformation. The conformation of the methane-sulfonate substituent is stabilized by inter-molecular C-H⋯O hydrogen bonds. The crystal packing results in alternating layers of polar methane-sulfonates and stacked bicyclo-hexa-nyl rings parallel to ab.
authors.affiliation: Department of Chemistry, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium.
authors.forename: Adrian
authors.initials: A
authors.lastname: Kremer
authors.forename: Bernadette
authors.initials: B
authors.lastname: Norberg
authors.forename: Alain
authors.initials: A
authors.lastname: Krief
authors.forename: Johan
authors.initials: J
authors.lastname: Wouters