-(4-Methoxy-2-nitrophenyl)-2-(3-methyl-2-oxo-1,2-dihydroquinoxalin-1-yl)acetamide.

Abstract

This study reports the crystal structure of an acetamide compound bearing a methoxy-nitrophenyl substituent and a methyloxo-dihydroquinoxalinyl moiety. The quinoxaline bicyclic system exhibits slight puckering, with a dihedral angle of 2.07° between the two fused rings. The overall molecular geometry adopts an L-shaped arrangement, and intramolecular hydrogen bonding dictates the spatial orientation of the substituted phenyl ring. The amide nitrogen is found to be nearly planar. Crystal packing is primarily governed by C-H···O hydrogen bond networks and slipped π-stacking interactions between adjacent molecules.