Received 1 May 2008
The asymmetric unit of the title compound, C14H7Cl3F2N2O2, contains two unique molecules. The 2,3,5-trichlorophenyl ring is almost coplanar with the urea group in both molecules, whereas the 2,6-difluorophenyl ring is twisted from the urea plane by 54.83 (10)° in one molecule and 60.58 (10)° in the other. An intramolecular N-H-O hydrogen bond stabilizes the molecular conformation. The crystal packing is formed by intermolecular N-H-O hydrogen bonds and FF interactions [2.841 (2) Å].
Data collection: CrystalClear (Rigaku, 2006); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: CrystalStructure (Rigaku, 2006).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JH2065 ).
This project was supported by the 11th Five-Year Construction Item for Yunnan University Teachers (grant No. 0030-WX069051).
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