INFRARED SPECTROSCOPY (IR). Infrared Spectroscopy. Chemical bonds absorb energy in the IR region related to the vibration of different bonds.
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Chemical bonds absorb energy in the IR region related to the vibration of different bonds.
Infra-red absorbance values are reported as units of wavelength (λ, μm) or more commonly as wave numbers (ν, cm-1) which are related to frequency.
ν = 1/λand v = c/λ
Ifλis in cm then wave numbers are calculated to be in cm-1.
Higher frequency and shorter wavelengths represent higher energy.
There ate two types of bond vibrational modes: 1. stretching and 2. bending
Common Bond Stretching Regions in an IR Spectrum: