Abstract
The direction of the reaction of sulfur with 2,3dichloro-1-propene I in the hydrazine hydrate–base system was shown to depend on the nature of the used bases. In the hydrazine hydrate–KOH system (molar ratio KOH:S = 1:1) the reaction with dichloride I affords bis(2-chloro-1-propen-3-yl)sulfide (78%) [1]. The disulfide anion generated in the system hydrazine hydrate–monoethanolamine reacts with dichloride I to give bis(2-chloro-1-propen-3-yl)disulfide (70%) [2]. Tellurium, which is reduced to the anions Теn only in the hydrazine hydrate–alkali system, reacts with 2,3dichloro-1-propene I with elimination of both chlorine atoms, and the reaction product is allene [1].
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