Spectrometry

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  • Created by: amy_br0
  • Created on: 08-05-14 18:16

INFARED SPECTROMETRY

Certain groups in a molecule absorb infra-red radiation ~ at different frequencies

  • shows BONDS present in a compound
  • ABOVE 1500cm ~ FUNCTIONAL GROUP IDENTIFICATION 
  • BELOW 1500cm ~ FINGERPRINTING 
  • 'Fingerprint' is unique to every compound
  • computer will compare IR spectra against a database of known pure compunds 
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MASS SPECTROSCOPY

a technique for measuring the masses of particles accurately

  • in a mass spec an electron is knocked off an organic molecule ~ MOLECULAR ION CREATED
  • molecular ion produces the peak furthest to the RIGHT (highest m/z)
  • accurate mass of molecular ion can be used to determine the molecular formula

MOLECULAR ION FORMED

  • M ---> [M]+  + e-
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