Question

Assignment: CO2 extraction of Eugenol 1. Which one of the following two compounds would you expect to have a higher solubility in liquid CO2. Explain your reasoning in a few sentences: HO. HC I CH ON CH3 Capsaicin Caffeine 2. Explain why percent recovery is utilized in the CO2 extraction of Eugenol as opposed to a theoretical yield. Limit yourself to 1-3 sentences. H3CO 3. List 3 signals that should be observed in the IR spectrum of Eugenol (whose structure is shown to the right). HO^ 4. In your own words, explain the purpose of sealing the 15 mL centrifuge tube and submerging it into hot water bath.

Answer 1

Answer:

O=C=0 O=C=0 ci HO. H3C- NT Capsaicin CO2 is a non-polar molecule, so is the liq. CO2 solvent. Capsaicin's most of the structral part like aromatic ring, hydrocarbon chain makes it largly non-polar. only amide bond and phenolic -OH makes it somewhat polar. This largly polar molecule dissolve well in non-polar liquid CO2 solvent. Capsicin capabale of making Hydrogen bond interaction with CO2 molecules. These Interactions solublizes Capsaicin in liq. CO2. CH3 Caffeine Caffein have more contributing polar resonance form making molecule as whole very polar. Hence Caffeine doesn't dissolve in liq. CO2

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