SHORT REPORT
Your Name:......
Section/Instructor:
Date:
Partner's Name:
2. SPECTROSCOPY
1. a) Calculate the IHD of your unknown (show all your calculations):
b) What does the value of IHD indicate?
2. a) Identify and explain the characteristic IR absorptions of your unknown, in 1400-4000 cm³¹ range.
b) What is the class (i.e., the functional group) of your unknown compound? Explain.
3. a) How many signals does 'HNMR spectrum of the unknown have?
b) What is the ratio between the numbers of different hydrogens in the compound?
c) Explain the splitting pattern of all signals.
d) Explain the chemical shifts of signals, based on the locations of hydrogens relative to the de-
shielding groups (if any) in the compound.
4. a) How many signals does "CNMR spectrum of the unknown have?
b) Explain the chemical shifts of signals, based on the locations of carbons relative todeshielding
groups (if any) in the compound.
5. Propose a structure for your unknown that matches all the above data. Give the IUPAC name of the
unknown and explain your conclusions. You can use the back of this page if you need more space.
Attach all spectra with comments to this report.
Unknown #: 18
Molecular Formula: C5H10O2
t,3H
q,2H
t,3H
q,2H
