Need help with analysis of IR spectroscopy and a few post-lab questions.
CHEM 308IR Data Analysis
Your IR spectrum will have many peaks labeled with numbers. You need only to pay attention to the
major peaks AND those peaks that you would expect to find, based on your molecule.
What you need to do:
a. On the spectrum, clearly draw the compound structure.
b. According to the instructions given in your lab manual:
• Draw the baseline
• Draw the intensity lines
a. Look at the Functional Group Region of your IR spectrum and identify the important
b. Look at your compound and determine which types of bonds are present, and then
look for those stretches in your spectrum. (For example, do you have a nitro group? A
c. Label all of these peaks on your spectrum with the type of bond as shown in the
• Note: you shouldn’t have more than ~6 in total, and many people will have
fewer than that.
The bold text in the partial spectrum below shows how you should label your IR stretches.