Search

The asymmetric unit of the title compound, C16H13N3OS, contains two independent mol­ecules. The dihedral angles between the planar rings differ in the two mol­ecules. Weak intra- and inter­molecular C—H⋯S and C—H⋯N hydrogen bonds may be effective in the stabilization of the crystal structure.

The title compound, C19H21FN3O3PS, was synthesized by the reaction of N-benzylidene-5-(4-fluorophenyl)-1,3,4-thiadiazol-2-amine and diethyl phosphite. Intermolecular N—H...O hydrogen bonds connect molecules into centrosymmetric dimers.

The title compound, C20H23N3O3PS, was synthesized by the reaction of N-(4-chloro­benzyl­idene)-5-m-tolyl-1,3,4-thia­diazol-2-amine and diethyl phosphite. There are intra­molecular C—H⋯O and C—H⋯S inter­actions and a strong inter­molecular N—H⋯O hydrogen bond.

The title compound, C18H17N3OS, was synthesized by the reaction of 5-m-tolyl-1,3,4-thia­diazol-2-amine and 3,5-dimethyl­benzoyl chloride. Mol­ecules of the compound are linked by inter­molecular N—H⋯N hydrogen bonds to form centrosymmetric dimers.

The asymmetric unit of the title compound, C9H9N3S, contains four mol­ecules which are inter­connected through N—H⋯N hydrogen bonding, resulting in the formation of a tetra­meric structure.

The title compound, C8H6FN3S, was synthesized by the reaction of 4-fluoro­benzoic acid and thio­semicarbazide. The two H atoms of the amine are involved in N—H⋯N hydrogen bonding, resulting in the formation of layers parallel to the (100) plane.

In the mol­ecule of the title compound, C20H23FN3O4PS, two methyl groups are disordered over two positions each, with site occupancy factors in the approximate ratio 2:1. The thia­diazole and benzene rings are planar; the thia­diazole ring is oriented with respect to the adjacent benzene ring at a dihedral angle of 7.54 (3)°, while the dihedral angle between the two benzene rings is 81.28 (3)°. In the crystal structure, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules, and a weak intra­molecular C—H⋯S hydrogen bond is also present.