The two title compounds, C10H9N3O2, (I), and C11H11N3O2, (II), are mon
omers, No intermolecular interactions are observed. The angle between
the planes of the phenyl and imidazole rings is 51.2(6) in (I) and 53.
9(5)degrees in (II). The nitro groups are twisted with respect to the
imidazole rings by 3.2(5) and 3.7(5)degrees in (I) and (II), respectiv
ely.