Multiple Choice
Which of the following best describes how to modify the structure of a base to draw its conjugate acid?
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3. Acids and Bases
Acids and Bases
Multiple Choice
Which is the correct arrow pushing formalism for the following acid/base reaction?
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Verified step by step guidance1
Identify the reactants: The first reactant is the amide ion (H₂N⁻) with a negative charge on nitrogen, which has two lone pairs of electrons. The second reactant is a terminal alkyne (H-C≡C-R) where R is a carbon chain.
Recognize the role of each reactant: The amide ion acts as a base, and the terminal alkyne acts as an acid in this reaction.
Determine the direction of electron flow: The lone pair of electrons on the nitrogen of the amide ion will attack the hydrogen atom of the terminal alkyne.
Draw the first curved arrow: This arrow should start from the lone pair on the nitrogen and point towards the hydrogen atom of the alkyne, indicating the formation of a new N-H bond.
Draw the second curved arrow: This arrow should start from the H-C bond of the alkyne and point towards the carbon atom, indicating the breaking of the H-C bond and the formation of a carbanion (C⁻).
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