The analogous reaction with sodium ethoxide and ethanol did afford ethyl acetate but poor amounts only of the thionester ClrHgCHzC (= S) OCzHs could be isolated, the main product being a similar polymeric material as was produced from the reaction of acetylthiohexyne with ammonia. Apparently the addition of ethanol to the thioketene proceeds more slowly than its polymerization. If nucleophilic cleavage of acetylthiohexyne is performed in the ...