title: (7aS)-(-)-Dimeth-yl(1-oxido-3-oxo-5,6,7,7a-tetra-hydro-3H-pyrrolizin-2-yl)sulfonium.
abstract: In the zwitterionic title compound, C(9)H(13)NO(2)S, the pyrrolidine heterocycle adopts an envelope conformation (with the C atom in the 7-position as the flap). The negative charge is delocalized over the two carbonyl groups and the C atom connecting them. The positive charge is located on the S atom. Two inter-molecular C-H⋯O inter-actions are observed. The molecular geometry at the S atom is trigonal pyramidal.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Gutiérrez-Lazcano
authors.forename: Joel L
authors.initials: JL
authors.lastname: Terán
authors.forename: Jorge R
authors.initials: JR
authors.lastname: Juárez
authors.forename: Marcos
authors.initials: M
authors.lastname: Flores-Alamo
authors.forename: Angel
authors.initials: A
authors.lastname: Mendoza