[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o1747
[ doi:10.1107/S1600536813029346 ]

1-Nitro-4-(4-nitro­phen­oxy)benzene: a second monoclinic polymorph

M. Naz, Z. Akhter, V. McKee and A. Nadeem

Abstract: In the title compound, C12H8N2O5, the aromatic rings are inclined to one another by 56.14 (7)°. The nitro groups are inclined by to the benzene rings to which they are attached by 3.86 (17) and 9.65 (15)°. In the crystal, mol­ecules are linked by C-H...O hydrogen bonds, forming a three-dimensional structure. The title compound is a new monoclinic polymorph, crystallizing in space group P21/c. The first polymorph crystallized in space group C2/c and the mol­ecule possesses twofold rotation symmetry. Two low-temperature structures of this polymorph (150 K and 100 K, respectively) have been reported [Meciarova et al. (2004). Private Communication (refcode IXOGAD). CCDC, Cambridge, England, and Dey & Desiraju (2005). Chem. Commun. pp. 2486-2488].

Copyright © International Union of Crystallography
IUCr Webmaster