Please explain. Thank you! **10.59** In the elimination of a vicinal dihalide to yield an internal alkyne, two equivalents of NaNH₂ are required—one for each equivalent of HX that is eliminated. When the product is a terminal alkyne, however, three equivalents of NaNH₂ are required. Explain why.**Diagrams Explanation:**1. **First Reaction:** - The starting material is a brominated alkane with vicinal bromine atoms. - Two equivalents of sodium amide (NaNH₂) are used. - The resulting product is an internal alkyne, showing that two HX molecules have been eliminated.2. **Second Reaction:** - The starting material is another vicinal dihalide similar to the first. - Here, three equivalents of NaNH₂ are used, followed by the addition of water (H₂O). - The resulting product is a terminal alkyne, indicating that an additional step involving the removal of a proton from the terminal alkyne is required, thus explaining the need for the third equivalent of NaNH₂.

Elimination of vicinal dihalide to yield an alkyne,two equivalents of NaNH2 are required to eliminate two equivalents of HX. But for terminal alkyne ,three equivalents of NaNH2 are required and also in last part of reaction hydrolysis is also required.

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In the elimination of a vicinal dihalide to yield an internal alkyne, two equivalents of NANH2 are required-one for each equivalent of HX that is eliminated. When the product is a terminal alkyne, however, three equivalents of NaNH2 are required. Explain why. Br 2 equiv NaNH, Br Br Br 1.3 equiv NaNH, 2. H,0

In the elimination of a vicinal dihalide to yield an internal alkyne, two equivalents of NANH2 are required-one for each equivalent of HX that is eliminated. When the product is a terminal alkyne, however, three equivalents of NaNH2 are required. Explain why. Br 2 equiv NaNH, Br Br Br 1.3 equiv NaNH, 2. H,0

Pushing Electrons

4th Edition

ISBN:9781133951889

Author:Weeks, Daniel P.

Publisher:Weeks, Daniel P.

Chapter3: Mechanisms

Section: Chapter Questions

Problem 29EQ

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Please explain. Thank you!

**10.59** In the elimination of a vicinal dihalide to yield an internal alkyne, two equivalents of NaNH₂ are required—one for each equivalent of HX that is eliminated. When the product is a terminal alkyne, however, three equivalents of NaNH₂ are required. Explain why.

**Diagrams Explanation:**

1. **First Reaction:**
- The starting material is a brominated alkane with vicinal bromine atoms.
- Two equivalents of sodium amide (NaNH₂) are used.
- The resulting product is an internal alkyne, showing that two HX molecules have been eliminated.

2. **Second Reaction:**
- The starting material is another vicinal dihalide similar to the first.
- Here, three equivalents of NaNH₂ are used, followed by the addition of water (H₂O).
- The resulting product is a terminal alkyne, indicating that an additional step involving the removal of a proton from the terminal alkyne is required, thus explaining the need for the third equivalent of NaNH₂.

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