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Q: How do you detect chirality ? A: Polarimetry ! Chem Act 12A Model 3

Chem 250 Writing Assignment Lab 4 – Personal Care Product 10/10/14 one page summary of primary article due 10/24/14 annotated bibliography due 11/14/14 final project due. 0. Q: How do you detect chirality ? A: Polarimetry ! Chem Act 12A Model 3. 0.

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Q: How do you detect chirality ? A: Polarimetry ! Chem Act 12A Model 3

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  1. Chem 250 Writing AssignmentLab 4 – Personal Care Product 10/10/14 one page summary of primary article due 10/24/14 annotated bibliography due 11/14/14 final project due

  2. 0 Q: How do you detect chirality ? A: Polarimetry !Chem Act 12A Model 3

  3. 0 2 Stereogenic Centers and a plane of symmetry

  4. 0 Chemistry 250-02 Organic Chemistry I Fall, 2014 Day 13 10/1/14 Chapter 6 An Overview of Organic Reactions What Kind of Reactions Are There? Why do Reactions Happen? How do Reactions Happen? What Factors Control Reactions?

  5. Functional Groups

  6. 0 Functional Groups & Polarity

  7. 0 Functional Groups C-FG or R-FG

  8. Reaction Mechanisms • Answer the question in detail: How do we get from reactants to products? • Include all steps in a multistep reaction • Indicate bond-making and bond-breaking by using curvedreaction arrows • Follow the electron flow so arrow becomes a new 2 electron bond ( - ) or a lone pair ( : ) Electrophile Nucleophile

  9. How Are Bonds Broken and Made ? homolytic heterolytic Elec Nuc

  10. Some Types of Organic Reactions

  11. Some Types of Organic Reactions • Addition • Elimination • Substitution hydrolysis - reaction with H2O condensation - formation of H2O • Rearrangement

  12. Garoutte ChemAct 33 p. 133-134

  13. Garoutte ChemAct 33 p. 133-134 Oxidation Reduction Substitution Hydrolysis Elimination (reverse is Addition) Acid-Base Oxidation - 3 types Add Oxygen Lose Hydrogen Loss of Electrons Substitution Condensation Addition (reverse is Elimination)

  14. How do we classify these reactions?Addition, Elimination, Substitution, Rearrangement

  15. How do we classify these reactions?Addition, Elimination, Substitution, Rearrangement Substitution Nucleophilic Polar-Ionic H+ Elimination Addition Δ Substitution Radical hν

  16. Reaction Types

  17. What Kinds of Organic Reactions Are There ? How Can We Describe These Reactions ?Problem 6.1

  18. What Kinds of Organic Reactions Are There ? How Can We Describe These Reactions ?Problem 6.1 elimination addition substitution rearrangement

  19. What Kinds of Reactions Are These?

  20. Polar Reactions • Recall polarity • These reactions involve a nucleophile (e- - rich) and an electrophile (e- - poor) • What kind of reaction is this ?

  21. Nucleophiles attack Electrophiles

  22. Reaction Types

  23. What kind of reaction is the transformation shown below? • an elimination reaction • a rearrangement reaction • a substitution reaction • an addition reaction • none of these

  24. In the reaction shown below which is the electrophile ? • propene • the H of HCl • the Cl of HCl • propane • none of these • all of these

  25. In the reaction shown below which is the nucleophile ? • propene • the H of HCl • the Cl of HCl • propane • none of these • all of these

  26. Free Energy Diagrams What Does the TS(‡) Look Like ?

  27. Which statement best describes the energetics of the reaction shown below?C2H4 + H2 → C2H6 • exothermic with positive activation energy • exothermic with negative activation energy • endothermic with positive activation energy • endothermic with negative activation energy • cannot be determined without knowing BDE’s

  28. On the reaction energy profile shown below which species has the highest energy ? • I • II • III • IV • V

  29. On the reaction energy profile shown below which is the highest energy intermediate? • I • II • III • IV • V

  30. On the reaction energy profile shown below which represents the slowest step? • I to II • II to III • III to IV • IV to V • All steps proceed at the same rate

  31. On the reaction energy profile shown below which represents the energy of the reaction? The energy difference between: • I and II • I and III • II and III • III and IV • III and V • I and V

  32. Organic Rxns and Biological Rxns

  33. Which of the following represents a correctly drawn reaction mechanism?

  34. Electrophilic Addition to Alkenes

  35. Electrophilic Addition to Alkenes

  36. Problems 5.6 and 5.7

  37. Where are the electrophilic sites?Where are the nucleophilic sites?

  38. Follow the arrows to the products

  39. Two Reactions of Radicals R-H → R-H →

  40. Radical SubstitutionThe Mechanism

  41. Radical Addition in Prostaglandin Synthesis

  42. Polar Bonds and Polar Reactivity

  43. Some Nucleophiles and Electrophiles

  44. Nucleophiles and Electrophiles React !

  45. 0 C-H bond breaking in alkanes

  46. How Can Bonds Be Broken and Made ?

  47. Polar Reactions

  48. Nucleophiles and Electrophiles

  49. Problem 5.4 and 5.8

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