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Alkenes

Alkenes. Properties Nomenclature Stability Addition Reactions. Ethylene. Electron Rich p -Bond. Cis and Trans no rotation about p -bond. Elements or Degrees of Unsaturation: p -Bond or Ring. Halogens replace Hydrogens. Saturated compounds with Oxygen and Nitrogen.

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Alkenes

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  1. Alkenes Properties Nomenclature Stability Addition Reactions

  2. Ethylene

  3. Electron Rich p-Bond

  4. Cis and Transno rotation about p-bond

  5. Elements or Degrees of Unsaturation: p-Bond or Ring

  6. Halogens replace Hydrogens

  7. Saturated compounds with Oxygen and Nitrogen

  8. Determine the # elements of Unsaturation

  9. Alkene Nomenclature

  10. Cyclic alkenes

  11. Alkyl Groups with p-Bonds

  12. Alkylidene GroupsDouble Bonds Fused to Rings

  13. Polyenes

  14. Name these Alkenes

  15. cis-trans Isomers

  16. E/Z System

  17. Establish Priority of Substituents on Each sp2 Carbon

  18. What’s My Name?

  19. (Z)-4-ethyl-5-isopropyl-4-nonene

  20. Priorities with Multiple Bonds

  21. E or Z?

  22. E or Z?

  23. Name These

  24. Hydrogenation Data Helps to Determine StabilityDHhydrogenation of Alkenes

  25. Enthalpy Change Shows Relative Energy of Alkene

  26. Both cis and trans 2-Butene are Hydrogenated to Butane

  27. “E” is More Stable than “Z” by 2.3 KJ/mol

  28. Relative Stabilities of Alkenes

  29. Hyperconjugationp bond associates with adjacent C-H s bond

  30. The Addition Reaction

  31. HBr Addition

  32. Markovnikov’s RuleThe addition of H-X across a double bond results in the more highly substituted alkyl halide as the major product.

  33. Depicting a Reaction

  34. Addition of HBr or HClMarkovnikov Addition

  35. Regiochemistry Determined by Stability of Intermediate

  36. Hyperconjugation

  37. Carbocation Stabilitymore highly substituted, lower energy

  38. 3o Carbocation forms Preferentially

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