A monoclinic polymorph with Z=4 of (E)-2,4-dihydroxyacetophenone 2,4-dinitrophenylhydrazone N, N-dimethylformamide monosolvate

作者：Han Hongfei^*; Liu Yaohua

来源：Acta Crystallographica Section E-Structure Reports Online, 2011, 67(12): O3434-U532.

DOI：10.1107/S1600536811050161

The title compound, C(14)H(12)N(4)O(6)center dot C(3)H(7)NO, is a monoclinic polymorph of an already published structure [Baughman et al. (2004). Acta Cryst. C60, 103-106]. In the previously reported structure, the compound crystallized in the triclinic space group P (1) over bar (Z = 2), whereas the structure reported here is monoclinic (P2(1)/n, Z = 4). In both forms, two intramolecular hydrogen bonds result in the formation of a fairly planar hydrazone skeleton (r.m.s. deviations for all non-H atoms = 0.127 angstrom for the monoclinic from and 0.131 angstrom for the triclinic form) and each molecule is hydrogen bonded to one solvent molecule. The principal difference between the two forms lies in the different orientation of the two molecules. In the monoclinic form, the two molecules are almost coplanar [dihedral angle = 3.27 (2)degrees], whereas in the triclinic form the two molecules are almost mutulally perpendicular (dihedral angle = 85.3 degrees).

• 出版日期2011-12
• 单位太原师范学院