Spectroscopy
- Created by: mohz
- Created on: 07-01-14 10:48
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- Spectroscopy
- Mass Spec
- Fragmentation
- M+1 peak
- no. of carbon atoms = (height of M+1 peak/height of M peak) x 100
- peak 1 unit to -> of M peak
- *caused by*
- 13C Isoptope
- M+2 peak
- *caused by*
- natural isoptopes of different masses of Cl and Br
- peak 2 units to -> of M peak
- M and M+2 peak heights
- 3:1 ratio because of 35Cl and 37Cl isoptopes
- 1:1 ratio because of 79Br and 81Br isoptopes (equal abundance = same height)
- *caused by*
- M+1 peak
- Fragmentation
- NMR
- Position of 13C or 1H atoms in a molecule
- Chemical Shift
- *depends on*
- Molecular environment
- Standard Substance (TMS)
- Calibration purposes
- Inert (doesn't react with the sample)
- Non-toxic
- Volatile (easy to remove from sample)
- *depends on*
- Spectrum
- 1H
- Obtained using samples dissolved in proton-free solvents
- e.g. deuterated solvents such as CDCl3 and CCl4
- *excpetions*
- e.g. CHCl3 contains 2H not 1H
- *excpetions*
- e.g. deuterated solvents such as CDCl3 and CCl4
- Obtained using samples dissolved in proton-free solvents
- 13C
- 1H
- Mass Spec
- 13C
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