A number of di‐(alk‐1‐ynyl) thioethers VIII have been synthesized using reaction scheme 1. Except for diethynyl ether VI the compounds are relatively stable. Reaction scheme 2 has been used to synthesize di‐(prop‐1‐ynyl) ether, a substance exploding at room temperature. An attempt to prepare (HC≡C)2O failed; this substance seems to be unstable even at −70°.
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Brandsma et al. (1962) studied this question.
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