Date Published: April 01, 2011
Publisher: International Union of Crystallography
Author(s): Fei Liu, Fang Zhang, Qifan Chen, Mingdong Dong.
In the title compound, C8H7F3N2O, the OH and NH2 substituents adopt a Z configuration with respect to the C=N bond. The hydroxyimidamide unit is almost planar (r.m.s. deviation = 0.007 Å) and subtends an angle of 26.25 (13)° with the benzene ring. The F atoms of the trifluoromethyl substituent are disordered over two sets of sites with an occupancy ratio of 0.783 (15):0.217 (15). In the crystal, O—H⋯N hydrogen bonds form centrosymmetric dimers. Additional N—H⋯O hydrogen bonds link the dimers into zigzag chains along the b axis. Weak intermolecular F⋯F contacts of 2.714 (5) Å are also observed.
For the preparation of the title compound, see: Rai et al. (2010 ▶). For the use of oxime derivatives in crystal engineering, see: Aakeröy et al. (2000 ▶). For a related structure, see: Orama & Saarinen (1996 ▶).