1-Nitro-4-(4-nitro-phen-oxy)benzene: a second monoclinic polymorph.
Acta Crystallogr Sect E Struct Rep Online
; 69(Pt 12): o1747, 2013 Nov 06.
Article
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| ID: mdl-24454202
ABSTRACT
In the title compound, C12H8N2O5, the aromatic rings are inclined to one another by 56.14â
(7)°. The nitro groups are inclined by to the benzene rings to which they are attached by 3.86â
(17) and 9.65â
(15)°. In the crystal, mol-ecules are linked by C-Hâ¯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 mol-ecule possesses twofold rotation symmetry. Two low-temperature structures of this polymorph (150â
K and 100â
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].
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