1. Upcoming Events Today: Take Home Quiz due and Sapling HW due. Tuesday: Prelab 2 and Postlab 1 due Next Thursday: Take Home Quiz 2 due Tonight: ACS talk for Van Vo, Ph.D.

2. Physical Properties of Unbranched Alkanes

3. Titan (Saturn’s Biggest Moon) Titan’s atmosphere is composed of Methane. The moon is so cold that there are clouds that rain liquid methane to form whole rivers and lakes!

4. Name the Following Hydrocarbons PentaneHeptane Hexane Octane

5. Which are Constitutional Isomers? Which are the Same Molecule? Same As A AB C Different Than A

6. Are These the Same Molecule? Same

7. Label C’s and H’s as 1 o, 2 o or 3 o 1o1o 4o4o 1o1o 2o2o 3o3o 2o2o 2o2o 3o3o 2o2o 4o4o 1o1o

8. Name that Compound! Methyl IodideEthyl Fluoride tert-butyl iodideisopropyl alcohol PentylamineButyl methyl ether sec-butyl chloride Rubbing Alcohol is Isopropyl Alcohol Methyl Iodide is a Pesticide sprayed on crops

9. Upcoming Events Today: Take Home Quiz 2 due Tuesday: Prelab 3 and Postlab 2 due A week from today: Take Home Quiz 3 due and Chapter 2 HW due online 2 weeks from today: 1 st exam This Saturday: ACS breakfast

10. Alkyl Halogen Bonds Strongest Bond Weakest Bond

11. Physical Properties of Unbranched Alkanes Namemp ( o C)bp ( o C)Density Methane-182-164Gas Ethane-183-88Gas Propane-190-42Gas Butane-1380Gas Pentane-130360.626 Hexane-95690.659 Heptane-90980.684 Octane-571260.703 Nonane-511510.718 Decane-301740.73 The larger the Alkane = Stronger Van Der Waals Forces = Higher bp

12. Van Der Waals for Long Chained Alkanes With a big enough chain, Van Der Waals can get quite strong even to form a high boiling liquid like mineral oil or a solid like wax. Wax sculpturesMineral Oil Candle

13. Comparison of Alkanes, Ethers, Alcohols and Amines Boiling Points Why do Alcohols and Amines have such high boiling point in comparison?

14. Different Conformations of Ethane

15. Different Conformations of Butane

16. Which of the following Conformation Is Highest in Energy?

17. Which of the following Conformation has the lowest energy and which has the highest? a.A is lowest; B is highest b.A and C are lowest; B is highest c.B is lowest; A and C are highest d.B is lowest; A is highest

18. Cycloalkanes: Ring Strain Angle strain results when bond angles deviate from the ideal 109.5 ° bond angle

19. Conformation Involved in a Ring Flip Is it a chair or a beer label? … I’ll let you decide.

20. Keq’s of Monosubstituted Cyclohexanes K eq = [equatorial conformer]/[axial conformer]

21. Practice Problem Convert cyclohexanol into a chair conformation, then show: A.Ring flipped Conformation B.Indicate the Lowest Energy of the 2 Conformations

22. Cis or Trans Cis Trans Cis Trans

23. Practice Problem Convert trans-1-tert-butyl-3-methyl into a chair conformation, then show: A.Ring flipped Conformation B.Indicate the Lowest Energy of the 2 Conformations

24. Where are 6-membered “Chairs” found is Nature? Many Drugs …. Morphine for exampleCholesterol and Hormones: Lysergic acid diethylamide – aka “LSD” Many, many more….. In Diamonds:

25. Slides Covered in Video

26. Name that Compound!

27. Convert to Skeletal Structure and Name that Compound!

28. Name that Compound!

29. Amines – Nasty Smelling Stuff Rotting Fish smells like trimethyamine and diethylamine Zombies if existed would Smell like putrescine or cadaverine which comes from Rotting human flesh

30. Name that Compound!