15. Analytical Techniques:IR, NMR, Mass Spect
Infrared Spectroscopy Table
An unsaturated carboxylic acid (E)-but-2-enoic acid, has a broad peak at 3400cm–1, and two sharp peaks at 1695 cm–1 and 1650cm–1 in the IR spectrum.
Explain and highlight the characteristics that make it evident that the acid is unsaturated and conjugated.