3) Two additional compounds (H₂0 and 2-methyl-2-butanol) are potentially present in the crude product obtained after the

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3 Two Additional Compounds H 0 And 2 Methyl 2 Butanol Are Potentially Present In The Crude Product Obtained After The 1 (18.94 KiB) Viewed 92 times

3 Two Additional Compounds H 0 And 2 Methyl 2 Butanol Are Potentially Present In The Crude Product Obtained After The 2 (55.94 KiB) Viewed 92 times

3) Two additional compounds (H₂0 and 2-methyl-2-butanol) are potentially present in the crude product obtained after the organic phase is removed from the separatory funnel and transferred to a dry 50 mL Erlenmeyer flask. Identify the procedural steps intended to remove each of these impurities from 2-chloro-2-methylbutane and briefly explain how each procedural step accomplishes its purpose. (4 pts)
Remove the aqueous layer and wash the organic layer with saturated aq. NaHCO3 solution (-20 mL). Stopper the funnel, invert it carefully, and open the stopcock of the funnel immediately to release any gas pressure. Shake the separatory funnel gently at first and then vigorously, with frequent venting. Separate the organic phase, transfer it to a dry 50 mL Erlenmeyer flask and add a small amount of anhydrous MgSO4. Stir the mixture briefly (-2 min) and remove the MgSO4 by gravity filtration (use folded filter paper) into a 25 mL round-bottomed flask. Equip the flask for simple distillation (Figure 5.2). Ensure that the rubber O-ring seal is correctly fitted inside the thermometer adaptor (your TA will demonstrate correct use of the O-ring). Also make sure that the system remains open to the atmosphere by leaving open the outlet on the vacuum adapter. Plug the sand bath into the Variac unit located under the fume hood and set dial between 40-50 (do not plug the sand bath directly into an electrical outlet). Weigh and record the mass of the collection flask prior to commencing distillation (place the flask in a small beaker when weighing). Collect the distillate that boils < 90 °C and record the approximate boiling range of this fraction. Record the weight of the collection flask containing the distillate, calculate the mass of product, and determine the % yield of the reaction. Submit samples for GC-MS, ¹H- and 13C-NMR analysis. Store the purified material in a capped, labeled sample vial, and keep it in your drawer for use as the starting material for the E2 reaction.