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.
Physical Properties of Unbranched Alkanes
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!
Name the Following Hydrocarbons PentaneHeptane Hexane Octane
Which are Constitutional Isomers? Which are the Same Molecule? Same As A AB C Different Than A
Are These the Same Molecule? Same
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
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
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
Alkyl Halogen Bonds Strongest Bond Weakest Bond
Physical Properties of Unbranched Alkanes Namemp ( o C)bp ( o C)Density Methane Gas Ethane Gas Propane Gas Butane-1380Gas Pentane Hexane Heptane Octane Nonane Decane The larger the Alkane = Stronger Van Der Waals Forces = Higher bp
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
Comparison of Alkanes, Ethers, Alcohols and Amines Boiling Points Why do Alcohols and Amines have such high boiling point in comparison?
Different Conformations of Ethane
Different Conformations of Butane
Which of the following Conformation Is Highest in Energy?
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
Cycloalkanes: Ring Strain Angle strain results when bond angles deviate from the ideal ° bond angle
Conformation Involved in a Ring Flip Is it a chair or a beer label? … I’ll let you decide.
Keq’s of Monosubstituted Cyclohexanes K eq = [equatorial conformer]/[axial conformer]
Practice Problem Convert cyclohexanol into a chair conformation, then show: A.Ring flipped Conformation B.Indicate the Lowest Energy of the 2 Conformations
Cis or Trans Cis Trans Cis Trans
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
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:
Slides Covered in Video
Name that Compound!
Convert to Skeletal Structure and Name that Compound!
Name that Compound!
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
Name that Compound!