Isolation of Methyl Salicylate: Practical Procedure and Calculations
Learn how to isolate Methyl Salicylate (Oil of Wintergreen) through a step-by-step procedure and understand the calculations for theoretical and practical yield. Explore uses of Methyl Salicylate and differences between reactant and intermediate in catalyzed and uncatalyzed reactions.
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Presentation Transcript
Isolation of Methyl Salicylate (oil of wintergreen)
5. Gently boil the solution for 75 minutes (maintain the temperature at approximately 80 C). 6. After the solution cools to room temperature, add 1 mL of CH2Cl2 to the reaction mixture 7. Shake the resulting suspension (with venting) 8. Allow the layers to separate, and transfer the organic layer, which contains your product, to another container.
9. Add 1 mL of an aqueous 5% sodium bicarbonate solution to the combined CH2Cl2 extracts 10. Mix the solutions together, allow the solvents to separate, and transfer the organic layer to a clean, dry flask. 11. Dry the CH2Cl2 solution with anhydrous sodium sulfate. 12. Evaporate the CH2Cl2 using a warm water bath and a gentle stream of compressed air.
Calculations: Theoretical yield/Practical yield: The theoretical yield is usually calculated from the equation Practical Yield = x Therefore, Percentage Practical Yield = Practical yield / Theoretical yield 100
Q1/ Write five uses for methyl salicylate? Q2/ What are the differences between reactant and intermediate for the catalyzed and uncatalyzed reaction explain it in a scheme?
