A window containing the FTIR spectrum for your product should now open. To collect an FTIR spectrum of your product, click on the FTIR spectrometer located to the right of the lab bench and drag the salt plate icon to the flask on the lab bench. Your instructor may or may not ask you to perform this section depending on how your class is structured. Details on interpreting FTIR and NMR spectra are found in your textbook. In the virtual laboratory, 'H and C NMR Spectra are available. The most common tools used for this analysis are Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. List the starting materials, solvent, reagent, and products formed: How long did it take to finish the reaction? What are the TLC values (R) for (a) Starting Materials: (b) Products: Write a mechanism for this reaction:įTIR and NMR Spectra After completing a reaction and working up the products, it is still necessary to confirm that the correct product was formed. The other layer can be discarded into the red bin. Your target compound should be in one of these layers. Either the organic or the aqueous layer can be removed by clicking and dragging it to the bench. Remember that the addition of any aqueous solvent also adds diethyl ether, although this is not shown (see note at the bottom of assignment 1-2: Performing a Separatory Funnel Extraction). Drag and drop the separatory funnel on the flask and then add the appropriate solvent to the funnel. When the reaction is complete, "work up" your reaction by doing a separatory funnel extraction. With the electronic lab book open (click on the lab book on the stockroom counter), you can also save your TLC plates by clicking Save on the TLC window. You can advance the laboratory time using the clock on the wall. 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 activity 1-1: Using Thin Layer Chromatography, please see the note at the bottom of that assignment regarding TLC in Beyond Labz). You should be able to observe the reaction mixture stirring in the flask. Start the reaction by clicking on the Stir button on the front of the stir plate. Now attach the heater, condenser, and N, gas to the round bottom flask so the reaction mixture can be heated. 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. The round bottom flask containing the starting materials should now be on the stir plate, and the contents of the flask should be visible on the chalkboard. Select the appropriate solvent and drag the flask to the Stir Plate on the lab bench. After entering the synthesis laboratory, use the available reagents on the stockroom shelf and identify the appropriate starting materials required to synthesize the target compound and add them to the round bottom flask. ynthesis Procedures Start Virtual ChemLab Organic and select Amide Formation from the list of assignments. Examine the product and determine the bond that will be formed. Keep in mind the mechanism and the order of activity found in this series. Or this assignment, the target compound that you should synthesize is This is a carboxylic acid derivative transformation.
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