Question

(7) 5. The infrared and Raman spectra of ibuprofen (C, H, 0,) are similar but have some interesting differences. Briefly comment on the differences observed in the four regions indicated (by arrows) in the spectra. For each region, give the corresponding chemical bond or molecular stretch associated with the absorption observed in the spectra. The IR spectrum and

I might have labelled things incorrectly. please explain the differences too!!! thanks.

Answer 1

Peak at 3050 cm-1 for sp2 CH stretch and at 2980 for Sp3 CH stretch and at 2650 cm-1 corresponds to OH stretch and at 1710 for C=O stretch and at 1600 cm-1 corresponds to benzene ring C=C stretch.

And peak at 780 corresponds to para disubstituted Benzene ring.