ADINA INSTITUTE OF SCIENCE AND TECHNOLOGY

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ADINA INSTITUTE OF SCIENCE AND TECHNOLOGY

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• SUBMITTED BY
• VAISHALI CHOURASIA
• EC VIII SEM

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• WHAT IS IR SPECTROSCOPY?

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• 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.

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• WHAT ARE THE DIFFERENT
• REGIONS IN IR SPECTROSCOPY ?

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

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• WHAT IS THE IMPORTANCE OF
  FUNCTIONAL GROUP?

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

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• IMPORTANT
• THINGS TO REMEMBER

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• 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.