title: 2,3-Dihydro-1H-pyrrolizin-1-one.
abstract: There are two nearly identical mol-ecules in the asymmetric unit of the title compound, C(7)H(7)NO. The mol-ecules are nearly planar (r.m.s. deviations of 0.025 and 0.017 Å) and oriented at a dihedral angle of 28.98 (3)°. The two mol-ecules are linked by a C-H⋯O hydrogen bond. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into zigzag chains along the c axis.
authors.forename: Yousaf
authors.initials: Y
authors.lastname: Ali
authors.forename: Yu
authors.initials: Y
authors.lastname: Peng
authors.forename: Erbing
authors.initials: E
authors.lastname: Hua
authors.forename: Mohammad Aijaz
authors.initials: MA
authors.lastname: Anwar
authors.forename: Mehboob Ali
authors.initials: MA
authors.lastname: Kalhoro