Pre-labs:
For each preparative lab you are required to submit at least 24 hours before the lab a pre-lab write-up. The pre-lab is to be written in your lab notebook and the carbon copies submitted for review. These carbon copies will later be attached to your lab report.
1. Title (be specific, eg. "Reduction of Acetophenone with Sodium Borohydride"), name & date.
2. Balanced chemical equation(s) for the reaction(s) that you are going to carry out.
3. Table of Physical Properties summarizing the physical properties of the reactants, solvents, and products. Make photocopies of the sample provided, or make up your own.
4. A step-by-step procedure for the reaction, separation, and purification. Be specific as to amounts (moles & weight or volume).
5. For multi-step syntheses prepare a separate Table of Physical Properties for each reaction in the sequence.
You may turn in pre-labs directly to the instructor or they may be placed in his mailbox in the Chemistry Office (NSM B-202). If you have not submitted a pre-lab before the lab you will not be allowed to begin the experiment until the pre-lab has been completed and okayed. Failure to submit pre-labs on time can severely affect your grade.
Lab Reports
A typed lab report is required for each experiment and is worth 20 pts (180 pts total) or approximately 45% of your total course grade. Reports are due one week after the scheduled completion of the experiment at 1:00 pm for section 01 and 9:00 am for section 02. Labs turned in after these times will be penalized 10% per day late.
Follow the following format for preparative reports:
1. Title, name & date (unknown #)
2. Balanced equation(s) for the reaction(s) you carried out.
3. Step-wise mechanism(s) for the reaction(s).
4. Physical data for your product(s) (weight, mp or bp, %yield, & literature mp or bp for comparison).
5. Tabulation of spectral data. (Tables summarizing the IR and nmr spectra and your interpretation). see attached.
6. Conclusions, comments, deviations, etc. Discuss your results.
7. Answers to the questions at the end of each preparation.
8. Attach to the end of the report:
a) the pre-lab including table of physical properties
b) any additional carbon copies from your lab notebook
c) IR & nmr spectra, glc's, etc.
Products
With your lab reports you are to turn in the products that you have synthesized in the laboratory. Note, the labels must contain your name, the date, the identity of the contents, the net weight, and the mp or bp. Solid products should be in wide-mouth bottles and liquids in narrow-mouth containers.