Abstract:
The energy of most of the molecular vibrations
falls into the infrared region (4000 - 400 cm-1) of the
electromagnetic spectrum. Infrared (IR) or vibrational
spectroscopy is used by organic chemists to: (i) identify
functional groups in solid, liquid, or gaseous forms,
(ii) differentiate inter- and intra-molecular hydrogenbonding, and (iii) investigate chemical reactions.