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Conjugated Dienes and U.V. Spectroscopy

Conjugated Dienes and U.V. Spectroscopy. Some Dienes. Some Conjugated Molecules. Prevents DNA from Unraveling. Y1 and Y2 for Ethylene. Orbital Depiction of Ethylene. Orbital Depiction. D H hydrogenation. Carbocation is Resonance Stabilized. Carbocation Stability.

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Conjugated Dienes and U.V. Spectroscopy

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  1. Conjugated Dienes and U.V. Spectroscopy

  2. Some Dienes

  3. Some Conjugated Molecules

  4. Prevents DNA from Unraveling

  5. Y1 and Y2 for Ethylene

  6. Orbital Depiction of Ethylene

  7. Orbital Depiction

  8. DHhydrogenation

  9. Carbocation is Resonance Stabilized

  10. Carbocation Stability

  11. Conjugate Addition of HBr

  12. 1,2- vs. 1,4-Addition

  13. Kinetic and Thermodynamic Products

  14. Kinetic vs. Thermodynamic Control

  15. 2 Different 1,4- Products Form

  16. Thermodynamic Products

  17. Addition to 1,3,5-Hexatriene

  18. At 0oC 1,2-addition is favored

  19. At 40oC, 1,4-addition is preferred

  20. Form more stable carbocation

  21. Allylic Bromination With NBS

  22. Free Radical Mechanism

  23. Mechanism involves the gradual generation of Br2

  24. Resonance stabilization leads to possibly several products

  25. Diels-Alder Reactiona Pericyclic Reaction

  26. Dienophiles Must be Electron Deficient

  27. Stereochemistry

  28. Bicyclic Adductsendo and exo

  29. Endo Addition

  30. Endo Rule

  31. Identify the Diene and Dienophile that gives the Adducts

  32. Two Phosphatase Inhibitors

  33. A Radiosensitizer

  34. Synthesis of LS-5

  35. 1,3-Butadiene and EthyleneMolecular Orbitals

  36. Proper Orbital Overlap

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