STRUCTURE OF 1-(3-METHYL-1-BUTENYL)PIPERIDIN-2-ONE

C10H17NO, M(r) = 167.25, monoclinic, P2(1), a = 6.619 (1), b = 7.339 (1), c = 11.284 (2) angstrom, beta = 103.63 (1)-degrees, V = 532.72 (14) angstrom 3, Z = 2, D(x) = 1.043 Mg m-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 0.06 mm-1, F(000) = 184, T = 250 K, final R = 0.082 for 838 observed reflections. Although disorder occurs in the six-membered lactam ring and the isopropyl group, the antiperiplanar conformation of the vinyl group relative to the amide system in the title compound is established. The crystal structure is stabilized by intermolecular hydrogen bonds between the vinylic beta-H atom and the carbonyl O atom of the next molecule, with a distance of 2.5 angstrom.