5-(4-Methylphenyl)-1,3,4-thiadiazol-2-amine

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5-(4-Phenoxyphenyl)-1,3,4-thiadiazol-2-amine

The title compound, C(14)H(11)N(3)OS, was synthesized by the reaction of phenoxy-benzoic acid and thio-semicarbazide. The thia-diazole ring makes dihedral angles of 0.99 (16) and 86.53 (18)°, respectively, with the benzene and phenyl rings. The dihedral angle between the benzene and phenyl rings is 87.17 (19)°. Intra-molecular C-H⋯S contacts are present. In the crystal, inter-molecular N-H⋯N hy...

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5-(4-Methylphenyl)-1,3,4-oxadiazol-2-amine

In the crystal structure of the title compound, C(9)H(9)N(3)O, adjacent mol-ecules are linked through N-H⋯N hydrogen bonds into a three-dimensional network.

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5-(4-Pyridyl)-1,3,4-thiadiazol-2-amine

The title compound, C(7)H(6)N(4)S, was synthesized by reacting pyridine-4-carboxylic acid and thio-semicarbazide. The asymmetric unit contains two independent mol-ecules, which present different conformations, the dihedral angles between the thia-diazole and pyridine rings being 18.2 (2) and 30.3 (2)°. In the crystal, inter-molecular N-H⋯N hydrogen bonds involving the amine groups as donors lin...

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5-(4-Pentylphenyl)-1,3,4-thiadiazol-2-amine

The title compound, C(13)H(17)N(3)S, was synthesized by the reaction of 4-pentyl-benzoic acid and thio-semicarbazide. The dihedral angle between the thia-diazole and phenyl rings is 29.9 (2)°. An intra-molecular C-H⋯S inter-action is observed. In the crystal, inter-molecular N-H⋯N hydrogen bonding links the mol-ecules into centrosymmetric dimers.

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