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

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Ethyl 2-(3-chloro-2-pyridyl)-5-oxopyrazolidine-3-carboxylate

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3-Chloro-5-(trifluoromethyl)pyridin-2-amine

In the title compound, C(6)H(4)ClF(3)N(2), an inter-mediate in the synthesis of the fungicide fluazinam, the F atoms of the trifluoro-methyl group are disordered over two sites in a 0.683 (14):0.317 (14) ratio. In the crystal structure, centrosymmetric dimers arise from pairs of N-H⋯N hydrogen bonds.

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

In the title mol-ecule, C(9)H(8)N(4)O(2)S, the dihedral angle between the thia-diazole and benzene rings is 73.92 (8)° and the thia-diazole group S atom is orientated towards the benzene ring, the central S-C-C-C torsion angle being 45.44 (18)°. In the crystal, supra-molecular tapes mediated by N-H⋯N hydrogen bonds and comprising alternating eight-membered {⋯HNCN}(2) and 10-membered {⋯HNH⋯NN}(2...

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

The title compound, C(8)H(6)FN(3)S, was synthesized by the reaction of 3-fluoro-benzoic acid and thio-semicarbazide. The dihedral angle between the planes of the thia-diazole and benzene rings is 37.3 (2)°. In the structure, two crystallographically independent mol-ecules form a centrosymmetric dimer, in which two inter-molecular N-H⋯N hydrogen bonds generate an R(2) (2)(8) motif.

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