Pre-lab 5: Lab- IR
assignments
Name:_____________________
1) How
many IR absorptions expected for following molecules? (10 pts)
a)
CO 2) H2O 3) NH3 4) CH3OH
2) Why
C=C (double bond) vibration appear at higher cm-1 value than C-C
(single bond)? (10 pts)
3) How do you measure IR absorptions of a solid sample? (10 pts)
Draw
the expanded molecular structure if necessary and assign the IR frequencies in
the following Spectra: ( use correlation charts or peaks values given at the
end of the assignment.
3) Acetophenone
(10 pts)
3) Acetone
