Question

Name: Date: Recitation Ass ignment: CO2 extraction of Eugenal Due October 27 at 5:00 pm Which one of the following two compounds would you expect to have a hig her solubility in 1. iquid CO, Explain your reasoning in a few sentences: Нс. сн Capsaicin Cafleine Explain why percent recovery is utilized in the CO, extraction of Eugenol as appased to a thearetical yield. Limit yau rself to 1-3 sentences 2 Hасо, List 3 signals that should be cbserved in the IR spectrum of Eugenal (whose s tructure is shown to the right). 3 но In your own worls, explain the purpose of sealing the 15 mlL centrifuge tube and submerging it into hotwater bath 4

Answer 1

SOLN 1

Solubility follows the rule 'like dissolves like'

CO2 is a non polar molecule so is liquid CO2

Capsaicin is mainly a non polar molecule owing to the presence of aromatic ring in most of the part, although it has OH and amide group due to which it is slightly polar hence its solubility will be more in liquid CO2

whereas in caeffine it is highly polar due to large number of resonating structure which is polar in nature hence caeffine is insoluble in liquid CO2

highly polar due to resonance soluble in liquid CO2 caffeine OH o mainly non polar due to hydrocarbon insoluble in liquid CO2 capsaicin

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