1. ADINA INSTITUTE OF SCIENCE AND TECHNOLOGY
SUBMITTED BY :
VAISHALI CHOURASIA
EC – VIII SEM

2. WHAT IS IR SPECTROSCOPY?

3. Infrared spectroscopy deals with the interaction between a molecule and radiation from IR region of the EM spectrum (IR region = 4000 – 400 cm-1 ) the cm-1 unit is the wave no. scale and is given by 1/(wavelength in cm).
IR radiation causes the excitation of the vibration of covalent bonds within that molecule. These vibrations include the stretching and bending modes.

4. WHAT ARE THE DIFFERENT REGIONS IN IR SPECTROSCOPY ?

5. IR spectrum is split into two appropriate regions and they are :
4000 – 1000 cm-1 known as the functional group region, and
< 1000 cm-1 known as the finger print region.

6. WHAT IS THE IMPORTANCE OF FUNCTIONAL GROUP?

7. Most of the information that is used to interpret an IR spectrum is obtained from the functional group region.

8. IMPORTANT
THINGS TO REMEMBER…

9. When analysing an IR spectrum avoid the temptation to try to assign every peak. The finger print region , however can be useful for helping to confirm a structure by direct comparison with a known spectra.