Eugenol is a naturally occurring chemical that has medical applications such as its use as a natural dental anesthetic. It can be extracted from cloves by using the method of steam distillation. The extracted compound will then be separated from the water using methyl chloride, which will then be evaporated using a rotary evaporator leaving only the essential oil, Eugenol. IR spectroscopy will be used to determine the structure of the extracted compound. Results and Discussion
Four samples of Eugenol were combined to be analyzed for the final product. A lower percent recovery, as indicated by Table 1 could be due to the fact that much of the weight of the cloves was not actually eugenol. Cloves Used| Eugenol Recovered | Percent Recovery|
10 g| 7.304 | (7.304/40) x 100% = 18.26%|
Table 1: Calculations of the percent recovery of Eugenol.
Figure 1: The structure of Eugenol.
The IR spectroscopy run on the sample gave results as shown in Table 2. The –OH stretch accounts for the hydroxyl group on the aromatic ring as shown in Figure 1. The C-H peaks are from the mexthoxy group on the aromatic ring. The C=C-H are a result of the hydrogen’s bonded to the carbons of the aromatic ring. The peak from the C=O stretch is not from the compound, but may be a result of product contamination.
Absorbance | Shape| Intensity| Group-motion|
3512.21| Broad| Weak| H2O or –OH stretch|
3072.52| Sharp| Medium| C=C-H stretch|
2948.85| Broad| Strong| C-H stretch|
2845.80| Sharp| Medium| C-H stretch|
1767.18| Sharp| Weak| C=O stretch|
Table 2: IR Table of sample taken.
Extraction of Eugenol began by taking 10 grams of cloves and placing them in a 250mL round bottom flask. This flask was then attached to a steam distillation apparatus and heated to the boiling point of about 100°C. The steam was condensed and collected in a graduated cylinder. This collected material consisted of water and the...