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7/6/22, 8:09 AM a-Halogenation - 3 Beyond Labz Assessment For this assignment, the target compound that you should synthesize is bromo-phenyl-acetic acid. This is another electrophilic substitution reaction. Examine the product and determine which bonds may be formed. Consider the mechanism and how a nucleophilic intermediate may be generated and used to form the new bond. This video will give you some background on Alpha Halogenation: 0 a Halogenation- Acidic In acidic or basic conditions- H 1 11 X, Synthesis Procedures 1. To start this activity, click this link for a-Halogenation-3. The lab will load in a new tab. Click back to this tab to read further instructions and complete the questions below. Use the available reagents in the Aldol section of the Stockroom tab of the tray and identify the appropriate starting materials required to synthesize the target compound and add them to the round bottom flask. Select the appropriate solvent and drag the flask to the Stir Plate on the lab bench. 2. The contents of the flask will be visible in Live Data. From the group of reagents found on the lab bench, select the correct reagent to synthesize the target compound and add it to the flask on the stir plate. Now attach the heater, condenser, and N₂ gas to the round bottom flask so the reaction mixture can be heated. 3. Start the reaction by clicking on the dials on the front of the stir plate. You should be able to observe the reaction mixture stirring in the flask. Monitor the progress of the reaction using TLC measurements as necessary until the product has formed and the starting materials have been consumed (if you have not previously completed the activity Using Thin Layer Chromatography, please see the note at the bottom of that assignment regarding TLC in Beyond Labz). You can advance the laboratory time using the clock on the wall. You can also save your TLC plates by clicking Save on the TLC window. ps://worksheets.beyondlabz.com/multiembedq.php?id=9522-9523-9524-9525-9526-9527-9528-9529-9530-9531-9532-9533-9534-9535-9536-9537-... 2/7
7/6/22, 8:09 AM 4. When the reaction is complete, "work up" your reaction by doing a separatory funnel extraction. Drag and drop the separatory funnel on the flask and then add the appropriate solvent to the funnel. Remember that the addition of any aqueous solvent also adds diethyl ether, although this is not shown (see note at the bottom of the activity Performing a Separatory Funnel Extraction). Either the organic or the aqueous layer can be removed by clicking and dragging it to the bench. Your target compound should be in one of these layers. The other layer can be discarded into the red bin. List the starting materials, solvent, reagent, and products formed: Remember that subscripts (AB) and superscripts (AB) can be included as needed using the _and ^ characters respectively. How long did it take to finish the reaction? hours What is the TLC value (R) for the Starting Materials? If none are present enter "0" Beyond Labz Assessment What is the TLC value (R) for the Products? If none are present enter "0" Draw a mechanism for this reaction. Please attach a file containing your drawn reaction diagram. Choose File No file chosen https://worksheets.beyondlabz.com/multi ... 9536-9537-... 3/7