Lab 3 Interpreting FTIR & MS Spectra
1. Write the IUPAC names and draw structures of the ten compounds you selected:
1. _________________
2.__________________
3.__________________
4.__________________
Etc.
2. To obtain the FTIR & MS spectra of these compounds, start Virtual ChemLab and select interpreting
IR then MS Spectra from the list of assignments on the whiteboard or click on the Qualitative Analysis
bench and click on the Spectra button on the chalkboard. You should see a list of all the compounds in the
spectra library in alphabetical order by IUPAC name. Mousing over a name in the list will show the
structure on the chalkboard. The four buttons on side of the list are used to select the different
spectroscopic techniques for the selected compound. Make sure the FTIR or MS button has been selected.
3. Using the Up or Down arrows on the Scroll Bar or dragging the Scroll Bar, find the names for the ten
compounds you have selected and click on the name to display the FTIR or MS spectrum for each.
Identify the relevant peaks for each of the FTIR spectra and record the position and associated functional
group for each in the FTIR tables.
List position (cm-1) & functional group 6.
1. 7.
2. 8.
3. 9.
4. 10.
5. etc.
Interpreting FTIR & MS Spectra
Table 1A. MS of (name of Compound)
m/z Peak value & fragmentation group 6.
1. 7.
2. 8.
3. 9.
4. 10.
5. etc.
4. Select two of the compounds from your list and write one discussion section for these two compounds.
This means putting the result into words; discuss all the values form your tables in words and numbers.
5. Convert the discussion into a conclusion. This means only highlighting certain key spectral data that
identifies the two compounds you selected in words and values.
