plain the chemical importance of the product from the first step? Explain about two layers in step 11. Which layer is on top in a separatory funnel? Why? Draw the structure of the product in the ether layer of step 12.

EBK A SMALL SCALE APPROACH TO ORGANIC L
4th Edition
ISBN:9781305446021
Author:Lampman
Publisher:Lampman
Chapter2: Crystallization
Section: Chapter Questions
Problem 3Q
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Answer questions regarding the synthesis of benzoic acid. 

  1. Explain the chemical importance of the product from the first step?

  2. Explain about two layers in step 11. Which layer is on top in a separatory funnel? Why?

  3. Draw the structure of the product in the ether layer of step 12.

  4. Draw the structure of product in the aqueous layer of step 13. Why the product will be in the aqueous layer?

  5. Draw the structure of product in the aqueous layer of step 14. 

Why did you use NaOH (aq) in step 13? Explain the reason in detail. 

Br
MgBr
.CO2H
Mg
1. CO2
Et,0
2. H3O*
Procedure:
8. Avoid moisture and add crushed 10 g dry ice into EF.
9. Pour the product mixture over dry ice and swirl for 10 min.
10. Add 10 mL water, then 10 mL 3M H2SO4 with 5 g ice.
11. Make total volume around 20 mL by adding ether. Separate two layers
12. Extract aqueous layer with ether (3X5ML). Combine and keep the ether layer.
13. Extract the ether layer with 1M NaOH(aq) and keep the aqueous layer.
14. Adjust pH to 3 of the above aqueous layer and keep it in ice bath.
15. Filter the precipitation and dry it in your drawer.
Transcribed Image Text:Br MgBr .CO2H Mg 1. CO2 Et,0 2. H3O* Procedure: 8. Avoid moisture and add crushed 10 g dry ice into EF. 9. Pour the product mixture over dry ice and swirl for 10 min. 10. Add 10 mL water, then 10 mL 3M H2SO4 with 5 g ice. 11. Make total volume around 20 mL by adding ether. Separate two layers 12. Extract aqueous layer with ether (3X5ML). Combine and keep the ether layer. 13. Extract the ether layer with 1M NaOH(aq) and keep the aqueous layer. 14. Adjust pH to 3 of the above aqueous layer and keep it in ice bath. 15. Filter the precipitation and dry it in your drawer.
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