1-(2,4-Di­nitro­phen­yl)-2-[(E)-2,4,5-tri­meth­oxy­benzyl­idene]hydrazine

The title compound, C₁₆H₁₆N₄O₇, is close to being planar, with a dihedral angle of 3.15 (11)° between the benzene rings. The meth­oxy groups at the ortho- and para-positions of the 2,4,5-tri­meth­oxy­phenyl group are almost coplanar with the ring [deviations of the C atoms = 0.017 (2) and −0.025 (2) Å, respectively], whereas the meta-meth­oxy group deviates slightly [C-atom displacement = 0.162 (2) Å]. Both the ortho- and para-nitro groups are close to being coplanar with their attached ring [dihedral angles = 7.81 (12) and 8.56 (11)°, respectively]. An intra­molecular N—H...O hydrogen bond generates an S(6) ring motif. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds involving the same H atom as the intra­molecular bond generate R₂²(12) loops. The dimers are linked by weak C—H...O inter­actions into sheets parallel to the (10-4) plane and the sheets are stacked by π–π inter­actions, with a centroid–centroid distance of 3.5974 (14) Å.

3-(4-Amino­phen­yl)-5-(4-meth­oxy­phen­yl)-4,5-di­hydro-1H-pyrazole-1-carbo­thio­amide

In the mol­ecule of title pyrazoline derivative, C₁₇H₁₈N₄OS, the pyrazole ring adopts an envelope conformation with the flap atom, which bears the meth­oxy­phenyl substituent, displaced by 0.0750 (12) Å from the plane through the other ring atoms. The two substituted benzene rings make a dihedral angle of 70.59 (6)°. The meth­oxy group is twisted slightly with respect to the attached benzene ring [C_meth­yl—O—C—C torsion angle = −8.84 (15)°]. An intra­molecular N—H...N hydrogen bond occurs. In the crystal, the pyrazoline mol­ecules are linked by N—H...O and N—H...S hydrogen bonds into zigzag layers parallel to the bc plane and stacked along the a axis by π–π inter­actions with centroid–centroid distances of 3.4690 (7) and 3.5792 (7) Å. C—H...π inter­actions are also present.