1 = recall alkene stability = resonance stability.

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Presentation transcript:

1 = recall alkene stability = resonance stability

2 Molecular Orbital Theory – single π bond

3 Molecular Orbital Theory – Two conjugated π bonds

4 Reaction Temperature can effect product ratios

5 General Example of a Diels-Alder (4 + 2 cycloaddition) *Note: Ethylene is generally considered unreactive, because it does not contain an electron withdrawing group.

6 List of Dienophiles

7 Isomer Nomenclature (endo/exo)

8 Endo/exo cont.

9

10 Unreactive Dienes

11 Highly Reactive Diene

12 Diene Polymers

13 Terpenes – composed of isoprene subunits

14 Conjugation – light adsorption

15

16 Eat your carrots… they are good for your eyes?

17

18 An increase in light adsorbing organic molecules can alert us of potential disease The “Heme” In hemoglobin gives our blood its color Z Z ZE Yellow Blue

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