3,3′-Bis(3,4,5-trimethoxy­benzo­yl)-1,1′-(o-phenyl­ene)dithio­urea ethanol solvate

In the mol­ecule of the title compound, C28H30N4O8S2·C2H6O, the benzene ring is oriented at dihedral angles of 38.50 (6) and 5.68 (5)° with respect to the trimethoxy­phenyl rings, while the two trimethoxy­phenyl rings are oriented at a dihedral angle of 44.18 (5)°. Intra­molecular N—H⋯O and N—H⋯S hydrogen bonds result in the formation of non-planar six-, seven- and eight-membered rings. The twisting modes of the two side arms are different [C—N—C—O and C—N—C—N torsion angles = 0.1 (3) and 11.8 (3)°, respectively, in one arm, and 4.6 (3) and −11.5 (3)° in the other]. In the crystal structure, inter­molecular N—H⋯O and O—H⋯O hydrogen bonds link the mol­ecules

6-(4-Pyrid­yl)-3-(3,4,5-trimethoxy­phen­yl)-1,2,4-triazolo[3,4-b][1,3,4]thia­diazole

In the mol­ecule of the title compound, C17H15N5O3S, the planar central heterocylic ring system is oriented at dihedral angles of 5.32 (4) and 9.41 (4)°, respectively with respect to trimethoxy­phenyl and pyridine rings. Intra­molecular C—H⋯N, C—H⋯O and C—H⋯S hydrogen bonds result in the formation of a nearly planar six-membered ring, which is oriented at a dihedral angle of 3.07 (5)° with respect to the central heterocylic ring system, and non-planar six- and five-membered rings having twist and envelope conformations, respectively. In the crystal structure, inter­molecular C—H⋯N and C—H⋯O hydrogen bonds link the mol­ecules. There is a C—H⋯π contact between the pyridine ring and a methyl group and a π–π contact between the central heterocylic ring system and the trimethoxy­phenyl ring [centroid–centroid distance = 3.758 (1) Å]

3,6-Bis(3,4,5-trimethoxy­phen­yl)-1,2,4-triazolo[3,4-b][1,3,4]thia­diazole

In the mol­ecule of the title compound, C21H22N4O6S, the planar central heterocyclic ring system is oriented with respect to the trimethoxy­phenyl rings at dihedral angles of 2.60 (5) and 3.60 (6)°. Intra­molecular C—H⋯N and C—H⋯S hydrogen bonds result in the formation of planar five- and six-membered rings. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules. There is a C—H⋯π contact between a methyl group and a trimethoxy­phenyl ring, and a π–π contact between the central heterocyclic ring system and a trimethoxy­phenyl ring [centroid–centroid distance = 3.640 (1) Å]