Acta Cryst. (2002). E58, o461-o464  [ doi:10.1107/S1600536802004993 ]

4-(2-Benzylamino-1-oxoethyl)-1,2,3,4-tetrahydro-6,7-dimethylquinoxalin-2-one

R. Kruszynski, T. J. Bartczak and E. Mikiciuk-Olasik

Abstract: All interatomic distances in the title compound, C₁₉H₂₁N₃O₂, are normal. The heterocycle of the quinoxalinone system exhibits a half-chair conformation. The value of the total puckering amplitude Q_T is 0.391 (5) Å. The benzylaminomethyl part of the side branch is close to planar. This weighted-least-squares plane makes a dihedral angle of 67.45 (14)° with the quinoxalinone plane. In the structure, there are C-HN and C-HO intramolecular hydrogen bonds. The molecules are held together by N-HO intramolecular hydrogen bonds, resulting in a dimeric structure. The dimers are linked by weak C-HO intermolecular hydrogen bonds, resulting in a three-dimensional layered hydrogen-bonded network.

Online 28 March 2002

Copyright © International Union of Crystallography
IUCr Webmaster