Lab Report Organic Chemistry

Don't over-work on this NMR activity. NMR is really powerful but we're just doing a little bit with it this week. Here's what you need to do:

1. Draw the expected compound: that should be clear from the lab handout, the pre-lab lecture, and what natural source you used.

2. Figure out how manyunique Hs there are. Look for symmetry. Think about replacing the Hs with other atoms and check to see if you'd name it differently (see the lab lecture ppt if you're not sure what that means). Label them some how.

3. Figure out how many unique Cs there are. Look for symmetry. Label them some how. HINT: Don't forget that C without H are visible in NMR so you shouldn't assume the number of H= the number of C.

4. Then look at your NMR data. How many signals do you see? Record this number somewhere. Highlight the peaks you think are "real", i.e. belong to your compound and which ones might be "noise". This should (in an ideal world) match your answer to #2. In your discussion you should comment upon that. Reasons it may not: 1) you counted wrong Ok other reasons you might want to actually mention.... There are less signals: Maybe the Hs weren't different enough, and the NMR couldn't see how different they were (we'll explain why later)There are more signals: b) Maybe you didn't just isolate 1 compound! This is likely true and explains all those little itty bitty peaks near the baseline. c) maybe your sample is wet and you're seeing water. Your IR should confirm this one. d) maybe you're seeing yoursolvent.

Likely all four of those things in #4 are happening. Remember there's a difference between ideal theory and real world data.

https://www.dropbox.com/s/gikri1db9v9od7b/Chemistry_Lab.zip?dl=0