... structure appears in certain N-heterocyclic carbenes. 1,2,4-TriazoleIUPAC name[hide]1H-1,2,4-triazoleOther names[hide]1,2,4-triazole pyrrodiazoleIdentifiersCAS number288-88 ... -3-2-5-4-1/h1-2H,(H,3,4,5) YKey: NSPMIYGKQJPBQR-UHFFFAOYSA-N Y InChI=1/C2H3N3/c1-3-2-5-4-1/h1-2H ... ,(H,3,4,5)Key ...