1. Pentane 72 57 43 29

2. 3-pentanone 86 57 29

3. 2-pentanone 86 43 71

4. Butylamine 73 30

7. MS Interpretation 1.Nominal M + - gives mass of ion 2.Exact m/z (high resolution) – get stoichiometry (each atom has exact mass) 3.Isotope Peaks –C+1 = 1.1%, O+2=.2% 4.Fragmentation – important with EI –What was lost? [(M-15) + - loss of CH 3 ]

8. McLafferty Rearrangement

9. Separations and Chromatography Chapters 26 – 28

10. Types of Separations Precipitation/filtration Distillation Extraction Ion exchange Chromatography Electrophoresis

11. Common properties exploited by separations Solubility Size Polarity Boiling point Electrical mobility

14. Chromatography – collection of methods that involve separation between 2 phases Mobile phase Stationary phase