1-[4-(4-Chlorophenyl)piperazin-1-yl]-3-(6-oxo-3,4-diphenyl-1,6-dihydropyridazin-1-yl)propan-1-one

In the title compound, C29H27ClN4O2, the six-membered ring of the pyridazine group is nearly planar [maximum deviation = −0.062 (2) Å] and its mean plane makes dihedral angles of 43.05 (9), 44.71 (10) and 72.57 (9)°, respectively, with the two phenyl and benzene rings. The piperazine ring has a chair conformation and its mean plane is almost perpendicular to the attached benzene ring, with a dihedral angle of 83.20 (16)°. In the crystal, molecules are linked via two pairs of C—H⋯O interactions, which result in the formation of chains propagating along [10-1]. Neighbouring chains are linked via C—H⋯π interactions.


supplementary materials
In the present study, the title compound has been synthesized for first time by (Doğruer et al., 2007) and characterized by spectroscopic techniques. Herein we report on the synthesis and its crystal structure.
In the crystal, molecules are linked via two pairs of C-H···O interactions which result in the formation of chains propagating along [1 0 -1], (Table 1 and Fig. 2). Neighbouring chains are linked via C-H···π interactions (Table 1).

Refinement
All the H atoms were positioned geometrically and refined using a riding model: C-H = 0.93 and 0.97 Å for CH and CH 2 H atoms, respectively, with U iso (H) = 1.2U eq (C).

Figure 1
The molecular structure of the title molecule, with the atom numbering. Displacement ellipsoids are drawn at the 30% probability level.   Table 1 for details; H atoms not participating in these interactions have been omitted for clarity].

1-[4-(4-Chlorophenyl)piperazin-1-yl]-3-(6-oxo-3,4-diphenyl-1,6-dihydropyridazin-1-yl)propan-1-one
Special details Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles Refinement. Refinement on F 2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses 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 observed criterion of F 2 > σ(F 2 ) is used only for calculating -R-factor-obs 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.