Chapter 11 - Alkenes; Infrared Spectroscopy and Mass Spectrometry

Chapter 11 - Alkenes; Infrared Spectroscopy and Mass Spectrometry

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Unformatted text preview: Chapter 11: Alkenes; I nf ra red Spectroscopy and M ass Spectrometry 11.1. Naming the Alkenes 11.2. St ructure and Bonding in Ethene: The Pi Bond 11.3. Physical P rope rties of Alkenes 11.4. Nuclear Magnetic Resonance of Alkenes 11.5. I nf ra red Spectroscopy 11.6. Measur ing the Molecular mass of Organic Compounds: Mass Spectromet ry 11.7. F ragmentation Patte rns of Organic Molecules 11.8. Degree of Unsaturation: Another Aid to I dentifying Molecular St ructure 11.9. Catalytic Halogenation of Alkenes: Relative Stability of Double Bonds 11.10. P reparation of Alkenes from Haloalkanes and Alkyl Sulfonates: Bimolecula r Elimination Revisited Regioselectivity in E2 reactions depend on the base o We can control (to an extent) which hydrogen is removed o More substituted double bonds are more stable: Saytzev rule o If a more hindered base is used, the thermodynamically less favored terminal alkene is formed, this follows Hofmann rule E2 reactions offer favor trans over cis o More thermodynamically favorable Some E2 processes are stereospecific o Before E2 reaction takes place, the bond will rotate so that the leaving o group and hydrogen are anti One enantiomer produces one type while the other produces the other type 11.11. P reparation of Alkenes by Dehydration of Alcohols ...
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