Experiment 6: Steam Distillation of Essential Oils
Name:
Pre-Lab Questions:
1. Why is steam distillation preferred over simple distillation for the isolation of
essential oils? (3 pts.)
2. Suppose you have an unknown essential oil that produces an IR spectrum with the
frequencies listed below.
Fill in the table below with the corresponding bond
information for listed frequencies. Propose a reasonable structure that accounts for
this data. (4 pts.)
Frequency (cm-1)
3062 and 3029
2814 and 2714
1727
1627
1605 and 1496
973
748 and 689
Absorption Stretches (Bonds)
Possible Structure:
3. How many
13
C NMR signals would you expect to observe for the following
compound? Label the structure below with numbers that correspond to each carbon
(or groups of carbons) that give rise to a particular signal. (3 pts.)
H
O