Ethyl 2-[4-(di­methyl­amino)­phen­yl]-1-phenyl-1H-benzimidazole-5-carboxyl­ate

In the title compound, C₂₄H₂₃N₃O₂, the benzimidazole ring system makes dihedral angles of 7.28 (5) and 67.17 (5)°, respectively, with the planes of the benzene and phenyl rings, which in turn make a dihedral angle of 69.77 (6)°. In the crystal, mol­ecules are connected by C—H...N and C—H...O inter­actions, forming a layer parallel to the bc plane. A π–π inter­action, with a centroid–centroid distance of 3.656 (1) Å, is observed in the layer.

N-[(2,6-Di­ethyl­phen­yl)carbamo­thio­yl]-2,2-di­phenyl­acetamide

In the title compound, C₂₅H₂₆N₂OS, the diethyl-substituted benzene ring forms dihedral angles of 67.38 (9) and 55.32 (9)° with the terminal benzene rings. The mol­ecule adopts a trans–cis conformation with respect to the orientations of the di­phenyl­methane and 1,3-di­ethyl­benzene groups with respect to the S atom across the C—N bonds. This conformation is stabilized by an intra­molecular N—H...O hydrogen bond, which generates an S(6) ring. In the crystal, pairs of N—H...S hydrogen bonds link the mol­ecules into inversion dimers, forming R₂²(6) loops. The dimer linkage is reinforced by a pair of C—H...S hydrogen bonds, which generate R₂²(8) loops. Weak C—H...π and π–π [centroid–centroid seperation = 3.8821 (10) Å] inter­actions also occur in the crystal structure.

6-(4-Methyl­phen­yl)-1,3,5-triazine-2,4-di­amine–benzoic acid (1/1)

The benzoic acid mol­ecule of the title adduct, C₁₀H₁₁N₅·C₇H₆O₂, is approximately planar, with a dihedral angle of 7.2 (3)° between the carb­oxy­lic acid group and the benzene ring. In the triazine mol­ecule, the plane of the triazine ring makes a dihedral angle of 28.85 (9)° with that of the adjacent benzene ring. In the crystal, the two components are linked by N—H...O and O—H...N hydrogen bonds with an R₂²(8) motif, thus generating a 1 + 1 unit of triazine and benzoic acid mol­ecules. The acid–base units are further connected by N—H...N hydrogen bonds with R₂²(8) motifs, forming a supra­molecular ribbon along [101]. The crystal structure also features weak π–π [centroid–centroid distances = 3.7638 (12) and 3.6008 (12) Å] and C—H...π inter­actions.

6-(4-Methyl­phen­yl)-1,3,5-triazine-2,4-di­amine–4-methyl­benzoic acid (1/1)

The 4-methyl­benzoic acid mol­ecule of the title adduct, C₁₀H₁₁N₅·C₈H₈O₂, is approximately planar with a dihedral angle of 6.3 (2)° between the carb­oxy­lic acid group and the benzene ring. In the triazine mol­ecule, the plane of the triazine ring makes a dihedral angle of 29.2 (2)° with that of the adjacent benzene ring. In the crystal, the acid and base mol­ecules are linked via N—H...O and O—H...N hydrogen bonds with an R₂²(8) motif, and the acid–base pairs are further connected via N—H...N hydrogen bonds with R₂²(8) motifs, forming a supra­molecular ribbon along [101]. Between the tapes, a weak C—H...π inter­action is observed.