The first quiz will be on October 7, 2004 at 12 pm am in the lecture. Please make sure that you arrive on time.

ATTN: answers to the below questions are due at the start of your second lab period; these answers should be part of your pre-lab write-up.

1. Referring to the oxidation reaction (step 3), answer the following questions.

a. What is the melting point of the aldehyde (6) and the benzylic alcohol (5)?

b. What are the most important changes in the IR spectrum of the aldehyde?

2. Referring to the resolution (step 1), answer the following questions.

a. Why is L-(+)-tartaric acid use in this step?

b. What is the theoretical yield (in g) for the ammonium salt that you are planning to isolate?

c. How much solvent is used to recrystallize the crude product?

d. What is the specific optical rotation for the ammonium salt isolated in the lab?

e. Which solvent should be used to determine the optical rotation?

f. Where is the polarimeter located?

3. Student X has isolated (R)-limonene from a natural source.

a. Which source could he have been using?

b. He observed an optical rotation of a=2.40^o for a 4.00% solution in a 5.00 cm cell. Determine the optical purity of the sample.

c. Suggest two alternative methods to determine the optical purity for the sample.