Aspects of this topic are discussed in the following places at Britannica.
...which in some cases can be isolated. Thioenolization of thioacetone would give 2-propenethiol, CH3C(SH)=CH2. Thioketones reversibly add hydrogen sulfide to yield gem-dithiols (i.e., having both −SH groups on the same carbon)—for example, propane-2,2-dithiol, CH3C(SH)2CH3, in the case of thioacetone. It is...
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