Abstract
The title compound (C14H8N2O7,M r =306.2) crystallizes in the orthorhombic space group Pbca witha=6.962(1).b=24.688(1), andc=15.890(1)Å,V=2731.0 Å3,D x =1.489 g·cm−3 forZ=8,μ=0.98 mm−1,F(000)=1296,T=293 K. FinalR=0.053 for 1873 observed reflections. The structure was solved by direct methods. Approximately planar molecules lie perpendicular to the [100] direction and show partial stacking. The structure is the first example of a symmetric anhydride which does not retain the symmetry in the crystal state. The two independent nitro groups twist out of the ring planes by 10.5 and 14.8°, respectively.
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Główka, M.L., Iwanicka, I. & Król, I. Crystal structure of m-nitrobenzoic anhydride. Journal of Crystallographic and Spectroscopic Research 20, 519–523 (1990). https://doi.org/10.1007/BF01221891
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DOI: https://doi.org/10.1007/BF01221891