4866 CM BREWSTER AND JC HARRIS VOl. 52 summary 1. Hydrazodithiodicarbonamide has been found to tautomerize into the thiol-imino form under experimental conditions which have been determined, and the interconvertibility of the two forms established. Imino-thiol- thiobiazole has been isolated as an intermediate compound during the formation of Freund's “Dithio-urazo1e”-now shown to be endo-imino-thiol-thiobiazole; the latter has been found ...