STRUCTURE OF N-(2-PHENYLETHENYL)PYRROLIDIN-2-ONE

C12H13NO, M(r) = 187.2, orthorhombic, Pbca, a = 10.896(3), b = 8.033 (2), c = 23.376 (8) angstrom, V = 2046 (1) angstrom 3, Z = 8, D(x) = 1.216 Mg m-3, lambda(Mo K-alpha) = 0.71073 angstrom, mu = 0.072 mm1, F(000) = 800, room temperature, final R = 0.058 for 1290 observed reflections. The ethylene group of the title compound has a trans configuration and is antiperiplanar to the amide system of the lactam ring. The five-membered lactam ring is nearly planar with a mean deviation of 0.005 angstrom from the plane. The crystal structure is stabilized by weak intermolecular H...O interactions between the vinylic beta-H atom and the carbonyl O atom of the next molecule, with a distance of 2.59 angstrom.