What is "thiadiazoles"

n. (plural of thiadiazole English)

In chemistry thiadiazoles are a sub-family of azole compounds. Structurally they are five-membered heterocyclic compounds containing two nitrogen and a sulfur atoms, and two double bonds, to give an aromatic ring; with the name thiadiazole originating from the Hantzsch–Widman nomenclature. Four possible structures exist depending on the relative positions of the heteroatoms; these forms do not interconvert and hence are structural isomers and not tautomers. The compounds themselves are rarely synthesized and possess no particular application, however compounds baring them as a structural motif are fairly common in pharmacology.

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1,2,5-thiadiazole-2D-skeletal.png |1,2,5-thiadiazole
1,3,4-thiadiazole-2D-skeletal.png |1,3,4-thiadiazole