3,4-Dihydro-3-methyl-6-nitro-2H-1,3-benzoxazin-2-one and p-Nitrophenyl Dimethylcarbamate

In 3,4-dihydro-3-methyl-6-nitro-2H-1,3-benzoxazin-2-one (C₉H₈N₂O₄) (1), the plane of the cis carbamate group is 11.1 (2)° to that of the benzene ring, whereas, in the acyclic analogue, p-nitrophenyl dimethylcarbamate (C₉H₁₀N₂O₄) (2), the corresponding angle is 51.88 (9)° and the configuration is transoid. In (1), the O1-C7-O2 angle is 115.4 (3)° and the O1-C7-N1 angle is 117.3 (2)°; in (2), the corresponding angles are 122.8 (2) and 110.8 (2)°, respectively.

-1