last updated Tuesday, November 18, 2003

Meeting 16 (Acetyl Ferrocene)

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

Important Announcements:

1. Final exam: December 4, 2003 from 1-3 pm in Knudsen 1200B.

2. Review session: December 2, 6-8 pm in Geology 3656

3. Proposal: due on November 18, 2003 (If you have problems please see me asap!)

4. Oral Presentation: December 4 and 5 in during the lab section (group presentation, but everybody has to speak!)

Homework assignments

1. How is the electrophile in this reaction generated? Show an appropriate chemical equation.

2. Which organometallic compounds are present in the reaction mixture after the reaction? Draw their structures.

3. Flash chromatography is used in this experiment. First petroleum ether is used as eluent, later a mixture of petroleum ether with ~10% ethyl acetate. What do you expect to observe during this step of the purification? What would happen if the student decide to use pure ethyl acetate instead?

4. Given are the following NMR data for Ferrocene and Benzene:

Rationalize the differences in chamical shift in the H- and the C-NMR spectrum.