2-(4-Bromophenyl)-N-(3,4-difluorophenyl)acetamide

In the title compound, C14H10BrF2NO, the dihedral angle between the mean planes of the 4-bromophenyl and 3,4-difluorophenyl rings is 66.4 (1)°. These two planes are twisted by 40.0 (5) and 86.3 (2)°, respectively, from that of the acetamide group. In the crystal, N—H⋯O hydrogen bonds and weak C—H⋯O and C—H⋯F interactions form infinite chains along [100].

ASP thanks the University of Mysore for research facilities. BN thanks the UGC for financial assistance through a BSR one-time grant for the purchase of chemicals. JPJ acknowledges the NSF-MRI program (grant No. CHE-1039027) for funds to purchase the X-ray diffractometer.
In (I) the dihedral angle between the mean planes of the 4-bromophenyl and 3,4-difluorophenyl rings is 66.4 (1)° ( Fig.   1). These two planes are twisted by 40.0 (5)° and 86.3 (2)°, respectively, from that of the acetamide group. Bond lengths are in normal ranges (Allen et al., 1987). In the crystal, N-H···O hydrogen bonds and weak C-H···O and C-H···F intermolecular interactions are observed forming a infinite chains along (100) and contribute to packing stability (Fig. 2).

Refinement
All of the H atoms were placed in their calculated positions and then refined using the riding model with Atom-H lengths of 0.95Å (CH), 0.99Å (CH 2 ) or 0.88° (NH). Isotropic displacement parameters for these atoms were set to 1.2 (CH, CH 2 , NH) times U eq of the parent atom.   Synthesis of (I).

2-(4-Bromophenyl)-N-(3,4-difluorophenyl)acetamide
Crystal data C 14 H 10 BrF 2 NO M r = 326.14 Orthorhombic, P2 1 2 1 2 1 a = 4.9136 (3)  Special details Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq Br1 0.05444 (13