1,5-Diphenylcarbonohydrazide N,N-dimethylformamide

In the title compound, C13H14N4O·C3H7NO, a 1,5-phenylcarbonohydrazide molecule cocrystallizes with an N,N-dimethylformamide molecule. In the 1,5-phenylcarbonohydrazide molecule, the two phenyl rings are twisted by an angle of 45.8 (5)°. Intermolecular N—H⋯O hydrogen bonds and weak intermolecular C—H⋯O interactions contribute to a supramolecular two-dimensional network in the (101) plane.

Crystal packing is dominated by N-H···O hydrogen bonds and weak C-H···O intermolecular interactions (Table 1) which contribute to a supermolecular 2-D network formed in the 101 plane ( Fig. 2).

Experimental
A mixture of 1, 5-diphenylcarbazide (0.0233 g), Cd(NO 3 ) 2 (0.0132 g), N, N-dimethylformamide (5 ml), and water (12 ml) was stirred at room temperature for 6 h. The solution was filtered and the filtrate was left to stand undisturbed. Upon slow evaporation at room temperature, the title compound appeared about a month later. The title compound was filtered, washed with water and dried at 298K. The single crystals were grown by slow evaporation of water and N, N-dimethylformamide in the filtered mixture of 1, 5-diphenylcarbazide, Cd(NO 3 ) 2 , N, N-dimethylformamide, and water at 298K.

Refinement
All of the H atoms were placed in their calculated positions and then refined using the riding model with Atom-H lengths of 0.93Å (CH), 0.96Å (CH 3 ) or 0.86Å (NH). Isotropic displacement parameters for these atoms were set to 1.2 times (NH), 1.2 (CH) or 1.2 (CH 3 ) times U eq of the parent atom. Fig. 1. The molecular structure of the title compound, C 16 H 21 N 5 O 2 , showing the atom-labeling scheme with displacement ellipsoids drawn at the 50% probability level.

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 > 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.