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. Air is passed through the solution. Which purpose does this serve? Show pertinent equations.

b. What do you observe during the reaction?

c. Heptane added to the solution during the work-up. Rationalize this choice.

d. The C=N peak is shifted to lower wavenumbers compared to the ligand. Explain briefly.

e. A student plans to acquire the UV-Vis spectrum for the catalyst in the range from 200-700 nm. Determine the appropriate concentration.

2. a. Explain briefly in which way the design of the catalyst yield to the preferential formation of one enantiomer.

b. What determines if the e.e. value is high or low?