2. Consider the molecules shown below, and indicate the number of ¹H NMR signals that are expected for each.
Br
CH₃
OH
3. What is the predicted splitting pattern in the ¹H NMR for the indicated hydrogens in the molecules shown below?
Br
CH₃
OH
4. Describe how you could use IR spectroscopy to differentiate between the sets of molecules shown below.
a)
OCH₃ and
CH₃
b)
OH and
CH₃
c)
H and
N-CH₃
5. As you know, the integration of ¹H NMR signals gives information about the number of protons causing that signal. These integrations are usually reported in the smallest possible ratios, and you may need to do a simple multiplication in order to make these integrations agree with your molecular formula. An example for a ketone with the formula C₅H₁₀O is shown here. What are the "real" integration values, and what is the structure of the compound?
C₅H₁₀O
1. 5H
1H
3
2
1
PPM
