Chemistry - Hydrocarbon Question with Solution | TestHub

When acetylene is passed into methanol at $160-200^{\circ }\mathrm{C}$ in the presence of a small amount $(1-2\%)$ of potassium methoxide and under pressure just high enough to prevent boiling, methyl vinyl ether is formed. The mechanism is believed to involve nucleophildic attack in the first step. $$\begin{array}{c}\mathrm{HC}\equiv \mathrm{CH}+{\mathrm{CH}}_3{\mathrm{O}}^{-}\to {\mathrm{C}}^{-}\mathrm{H}={\mathrm{CHOCH}}_3\\ \stackrel{{\mathrm{CH}}_3\mathrm{OH}}{⟶}{\mathrm{CH}}_2=\underset{\text{ Methyl vinyl ether }}{\mathrm{CHO}{\mathrm{CH}}_3+{\mathrm{CH}}_3{\mathrm{O}}^{-}}\end{array}$$