Question

Name: Dale: Recitation Assignment: CO, extraction ol Eugenol Due: October 27" al 5:00 pm 1. Which one cl the lollowing two compounds would you expect to have a higher solubility in liquid CO2. Explain your reasoning in a l'ew sentences: Ma Y Cho CH3 Caffeine Capsaicin 2. Explain wliy percent ICCovery is utilized in the CO, extraction of Eugenol as opposed to a theoretical yield. Limit youlself to 1-3 sentences. 3. List 3 signals that should be observed in the IR spectrum of Eugenol (whose structure is shown to the right). Hico HO 4. In your own words, explain the purpose ol sealing the 15 ml. centrifuge lube and submerging in into hot water bath.

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:

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.

3. List 3 signals that should be observed in the IR spectrum of Eugenol (whose structure is shown to the right).

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 - Question 1:

The CO₂ is a non-polar molecule, which means that is a great solvent for non-polar or slightly polar compounds (as caffeine and capsaicin). The solubility in CO₂ decrease when the molecular weight of compounds increases. The molar mass of caffeine is 194.19 g/mol whereas the molar mass of capsaicin is 305.41 g/mol. Then, the caffeine is expected to have a higher solubility in CO₂ than capsaicin.