4-Chloro-N-(3,4-dimethylphenyl)benzamide

In the title compound, C15H14ClNO, the N—H bond is trans to the C=O bond. The dihedral angle between the two aromatic rings is 5.5 (2)°. In the crystal, intermolecular N—H⋯O hydrogen bonds link the molecules into chains running along the a axis.

In the title compound, C 15 H 14 ClNO, the N-H bond is trans to the C O bond. The dihedral angle between the two aromatic rings is 5.5 (2) . In the crystal, intermolecular N-HÁ Á ÁO hydrogen bonds link the molecules into chains running along the a axis.
The packing diagram of molecules in (I) showing the intermolecular N-H···O hydrogen bonds (Table 1) involved in the formation of molecular chains running along the a-axis is shown in Fig. 2.

Experimental
The title compound was prepared according to the literature method (Gowda et al., 2003). The purity of the compound was checked by determining its melting point. It was characterized by recording its infrared and NMR spectra.
Needle like colourless single crystals of the title compound used in X-ray diffraction studies were obtained from a slow evaporation of its ethanolic solution at room temperature.

Refinement
The H atom of the NH group was located in a difference map. It was refined with the distance restrained to N-H = 0.86 (1) %A. The other H atoms were positioned with idealized geometry using a riding model with C-H = 0.93-0.96 Å. All H atoms were refined with isotropic displacement parameters set to 1.2 times of the U eq of the parent atom.   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 > σ(F 2 ) is used only for calculating Rfactors(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.