Announcements

1. Make sure that you make progress on your formal report as well in terms of literature search and writing the parts that you completed already in the lab. The draft version of paper is due on 10-24-2008 at 5 pm. The draft version is worth 15 points, the final paper 45 points. For more information what the draft is supposed to contain see here. Late submission will receive less credit. The more of your work you submit here, the more feedback you will get, which will beneficial for the final version. We will try to return the reports by Monday.

2. The second quiz will be administered on Thursday, October 9, 2008 at 11 am covering the resolution step and the ligand synthesis. Please make sure that you show up on time. Otherwise you will not be allowed to take the quiz!!!

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

1. Referring to the synthesis and characterization of the Jacobsen catalyst, answer the following questions.

a. Why is the ligand initially refluxed in ethanol?

b. The manganese(II) acetate is crushed prior addition to the ligand suspension. Explain why.

c. Why is it important to immerse the glass tube into the suspension during the reaction?

d. The reaction is monitored with TLC. What is used as mobile phase? What is the student looking for here?

e. After the reaction is deemed complete, the solvent is removed and the residue is extracted with dichloromethane. Explain.

f. After removal of the drying agent, heptane is added and the mixture is heated. Why?

g. How does the final product appear?

h. What are the major changes in the FTIR spetcrum of the ligand and the catalyst?