1,2-Bis[(1,3-benzodioxol-5-yl)methyl­idene]hydrazine

The complete mol­ecule of the title compound, C₁₆H₁₂N₂O₄, is generated by the application of a centre of inversion. The (1,3-benzodioxol-5-yl)methyl­idene fused-ring system is approximately planar (r.m.s. deviation = 0.020 Å) and is essentially coplanar with the central hydrazine group [dihedral angle = 5.08 (9)°]. Weak π–π inter­molecular inter­actions are observed [centroid–centroid distance = 3.8553 (8) Å], providing some packing stability.

1,2-Bis(3-phen­oxy­benzyl­idene)hydrazine

Mol­ecules of the title compound, C₂₆H₂₀N₂O₂, reside on crystallographic centres of inversion located at the mid-point of the N—N bond. The benzyl­idene ring is essentially coplanar with the central hydrazine group, with an inter­planar angle of 4.5 (2)°, whereas the phenyl ring is oriented at 34.0 (3)° with respect to the mean plane of the central 1,2-dibenzyl­idenehydrazine group. In the crystal, C—H...π(arene)-ring inter­actions link mol­ecules about inversion centres.

N-(4,6-Dimeth­oxy­pyrimidin-2-yl)-2-(3-methyl­phen­yl)acetamide

In the title compound, C₁₅H₁₇N₃O₃, the dihedral angle between the pyrimidine and benzene rings is 87.0 (7)°. In the crystal, mol­ecules are linked into inversion dimers with R₂²(8) graph-set motifs by a pair of N—H...O hydrogen bonds. Weak C—H...O hydrogen bonds and inter­molecular π–π inter­actions [centroid–centroid distance = 3.544 (1) Å] are also observed.