The synthesis of the 5-heteromercapto-l, 2, 4-triazoles (Ia-d) was accomplished by reacting the substituted 5-mercapto-l, 2, 4-triazoles (Ia-d) with 4-bromoantipyrine (IIa), 2- chloromethylbenzimidazole (IIb), 2-chloroquinoline (IIc), 5-nitro-8-chloroquinoline (IId), and 2-ethoxy-6-nitro-9'chloroacridine (IIe)(see Table i).