Pyridazine-3,4,6-trithiol

For thiones, the thione form is generally present (86JPR522), although it was claimed without proof that 4-arylmethyl-6-methyl-3-mercaptopy-ridazine exists in the thiol form (80S410). For pyridazine-3,4,6-trithiol, no firm conclusion could be reached about its preponderant tautomeric form, but it was concluded that it does not exist in the trithiol form nor as the 6(1//)- or 3(2//)-thione (78AJC389). 

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