2-(4-Bromophenyl)-N-(2,6-dimethylphenyl)acetamide

In the title compound, C16H16BrNO, the dihedral angle between the benzene rings is 69.8 (2)°. In the crystal, N—H⋯O hydrogen bonds link the molecules into C(4) chains propagating in [100]. Adjacent molecules in the chains are also linked by C—H⋯O interactions which, along with the N—H⋯O hydrogen bonds, generate R 2 1(6) loops.

In the title compound, C 16 H 16 BrNO, the dihedral angle between the benzene rings is 69.8 (2) . In the crystal, N-HÁ Á ÁO hydrogen bonds link the molecules into C(4) chains propagating in [100]. Adjacent molecules in the chains are also linked by C-HÁ Á ÁO interactions which, along with the N-HÁ Á ÁO hydrogen bonds, generate R 2 1 (6) loops.

Comment
In continuation of our work on synthesis of amides (Fun et al., 2011a(Fun et al., , 2011b(Fun et al., , 2012a(Fun et al., , 2012b, we report herein the crystal structure of the title compound. In the title molecule ( Fig. 1), the two benzene rings (C1-C6 and C9-C14) make a dihedral angle of 69.8 (2)°. Bond lengths and angles are within normal ranges and are comparable to related structures (Fun et al., 2011a(Fun et al., , 2011b(Fun et al., , 2012a(Fun et al., , 2012b).

Refinement
Atom H1N1 was located in a difference Fourier map and refined freely [N-H = 0.91 (4) Å]. The remaining H atoms were positioned geometrically and refined using a riding model with C-H = 0.93-0.97 Å and U iso (H) = 1.2 or 1.5 U eq (C). A rotating-group model was applied for the methyl groups.  The molecular structure of the title compound showing 30% probability displacement ellipsoids for non-H atoms.

Figure 2
The crystal structure of the title compound, viewed along the b axis. H atoms not involved in hydrogen bonds (dashed lines) have been omitted for clarity. 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. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2sigma(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

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