N-(4-Meth­oxy-3-nitro­phen­yl)acetamide

The title compound, C(9)H(10)N(2)O(4), crystallizes with a disordered nitro group in twinned crystals. Both the meth­oxy group and the acetamide groups are nearly coplanar with the phenyl ring, and the C—N—C—O torsion angle [0.2 (4)°] is also insignificantly different from zero. Overall, the 12-atom meth­oxy­phenyl­acetamide group is nearly planar, with an r.m.s. deviation of 0.042 Å. The nitro group is twisted out of this plane by about 30°, disordered into two orientations with opposite senses of twist. In the crystal, the N—H group donates a hydrogen bond to a nitro oxygen atom, generating chains propagating in the [101] direction. The amide carbonyl oxygen atom is not involved in the hydrogen bonding. [Image: see text]