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When acetylene is passed into methanol at 160- 200°C in the presence of a small amount of potassium methoxide under pressure, the following is formed -

Answer:

Explanation:

When acetylene is passed into methanol at 160-200°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.