CHE 320 CH14

  1. what is a ether
    R-O-R
  2. what is a epoxide
    a cyclic ether with O being in the cyclic molecule connected to the carbons
  3. what is a thioether
    R-S-R
  4. what is a symmetrical ether
    when the two R groups connected to the O are the same
  5. what is a asymmetrical ether
    when the two R groups connected to the O are diffrent
  6. why are ethers good solvent
    becouse they can bond to both polar and nonpolar molecules
  7. why can ethers bond to polar molecules
    because they can form dipole-dipole and H bond interactions with polar molecules
  8. why can ethers bond to nonpolar molecules
    because the R groups of the ethers are hydrocarbons forming dispersion forces with nonpolar molecules
  9. why is a crown ether attracted to metal ions
    because it forms ion-dipole interactions
  10. what does a crown ether allow you to do
    deliver metal ions to reactions
  11. how do you name the other side of the ether in IUPAC
    do the naming prefix(methyl, ethyl, etc) then add oxy to the end, (methoxy, ethoxy, etc)
  12. what is a oxetanes
    a cyclic ether with three carbons bonded to the O
  13. what is a furans
    a cyclic ether with four carbons bonded to the O with the ability to have two double bonds
  14. what is a pyrans
    a cyclic ether with five carbons bonded to the O with the ability to have two double bonds
  15. what is a dioxanes
    a cyclic ether with four carbons bonded to two separate O at 1 and 4
  16. how is a alkoxide formed
    take a R-OH and react with Na, K, NaH, to get R-O(-)
  17. what is diffrent about making a alkoxide from a OH on a cyclic molecule
    you can use NaOH since it is a weaker acid
  18. what is williamson ether synthesis
    SN2 attack of alkoxide ion on a unhindered primary halide or tosylate
  19. how are thioethers synthesized
    R-SH reacted with NaOH to get R-S(-) which then reacts with a primary or secondary alkyl halide or tosylate
  20. what is peroxyacid epoxidation
    alkene reacting with peroxyacid, MCPBA, MMPP, to form epoxide
  21. how can you form a cyclic ether
    react a halohydrin and a 2,6 lutidine together
  22. what happins when you react a halohydrin and a 2,6 lutidine together
    the lutidine takes a H from the oxygen, causing the oxygen to grab onto the carbon connected to the halogen, making the halogen leave and forming a cyclic ether
  23. what happens in acid catalyzed ring opening of epoxides
    the bond to the more substituted carbon goes onto the oxygen leaving it positive
  24. what will tell you it is a acid catalyzed ring opening of epoxides
    H3O(+), H(+), or H2SO4
  25. what happens in base catalyzed ring opening of epoxides
    the bond to the less substituted carbon goes onto the oxygen leaving it positve
  26. what tells you it is a base catalyzed ring opening of epoxides
    OH(-), H2O and OH(-), CH3ONa
  27. what can be done with a catalyzed ring opening of epoxides
    you can take the positive carbon and have a oxygen attach to it with the oxygen losing a H to lose the +
  28. what is the result of Using Grignards reagents on epoxides
    C- minus attaches to a mix of the carbon+ unless one has 2 or more R groups where it will attach to the less hindered carbon.
  29. what is reacted in a grignard reaction
    Mg and ether
  30. what is reacted in a organlithium reaction
    2 Li
  31. what is the result of using a organlithium reagent on a epoxide
    lithium is always on less hindered carbon
Author
Anthill
ID
365776
Card Set
CHE 320 CH14
Description
Updated