Modern analytical techniques
- Created by: LauraNannini
- Created on: 24-04-20 09:36
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- Topic 7
- Molecular ion peak
- The peak furthest to the right
- If there is a peak next to it with a value +1 higher than the MIP it is carbon13
- Equation to show the process
- EXAMPLE: C4H10 + e- -> C4H10+ + 2e-
- The peak furthest to the right
- Fragmentation
- Positive ion made
- Neutral (usually a radical) is made
- Mass spectra structure deduction
- M/Z values tell you what may be present at the peaks
- If two graphs show isomers of the same organic compound you can figure out their separate structures
- Infrared spectroscopy
- Bonds stretch and bend when absorbing infrared radiation
- The narrow peaks show the most absorbed value
- Each bond have a unique wavenumber
- Non-polar molecules dont' absorb infrared radiation
- Functional groups can be determined by looking at the peaks and the value table
- Molecular ion peak
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