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INFRARED SPECTROSCOPY (IR)

INFRARED SPECTROSCOPY (IR). Infrared Spectroscopy. Chemical bonds absorb energy in the IR region related to the vibration of different bonds.

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INFRARED SPECTROSCOPY (IR)

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  1. INFRARED SPECTROSCOPY(IR)

  2. Infrared Spectroscopy 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. ~ ~ ~

  3. IR Vibrational Modes There ate two types of bond vibrational modes: 1. stretching and 2. bending

  4. IR Absorbance Regions Common Bond Stretching Regions in an IR Spectrum:

  5. IR Spectrum: n-hexane

  6. IR Spectrum: 1-hexene

  7. IR Spectrum: 1-octyne

  8. IR Spectrum: 2-octyne

  9. IR Spectrum: di-n-propyl ether CH3CH2CH2-O-CH2CH2CH3

  10. IR Spectrum: 1-butanol

  11. IR Spectrum: di-n-propylamine

  12. IR Spectrum: 2-heptanone

  13. IR Spectrum: butanal

  14. IR Spectrum: methyl benzoate C O

  15. IR Spectrum: hexanoic acid

  16. IR Spectrum: butanamide

  17. IR Spectrum: butanenitrile

  18. ENDINFRARED SPECTROSCOPY(IR)

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