When Preparing Terminal Alkynes by an Elimination Reaction, Sodium Amide

question 104

Multiple Choice

When preparing terminal alkynes by an elimination reaction, sodium amide (NaNH₂) dissolved in liquid ammonia (NH₃) is used most frequently. Which of the following statements offers the best explanation for the above statement?

• A) The above statement is false; terminal alkynes are not produced under the given conditions.
• B) Sodium amide deprotonates the terminal alkyne, driving formation of the alkynide ion.
• C) Only sodium amide is a strong enough base to deprotonate a carbon.
• D) Terminal alkynes are more stable than the internal alkynes, and are always the favored product.
• E) Steric hindrance favors preparation of the less substituted terminal alkyne.

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