4. Diagram the two-step mechanism for the alkylation of propyne to 2-hexyne. Label the mechanism arrows. (6pts.) 1. NaNH2 H 2. Br
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- **Arrow**: Draw an arrow from the lone pair on the nitrogen of NaNH₂ to the hydrogen on propyne. Draw another arrow from the C-H bond to the carbon, forming the acetylide ion. Show more…
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