ochem ch 6 alkyl halides part 2

Card Set Information

Author:
mikepl103
ID:
242684
Filename:
ochem ch 6 alkyl halides part 2
Updated:
2013-10-28 20:28:18
Tags:
halide halogenation SN2 SN1 nucleophile hydride shift saytzeff rule e1 e2 substitution elimination
Folders:

Description:
halide halogenation SN2 SN1 nucleophile hydride shift saytzeff rule e1 e2 substitution elimination
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user mikepl103 on FreezingBlue Flashcards. What would you like to do?


  1. What is the rate law for an Sn2 reaction?
    rate = k[R-X][Nucleophile]

    • so if you only double [R-X], then rate doubles. And if you only double [Nuc],
    • then rate doubles as well.
  2. What type of
    nucleophile (weak or strong) favors an Sn2 reaction>
    strong
  3. What is another
    name for the sn2 reaction?
    walden inversion
  4. what is the Sn2 mechanism?
    • Sn2 mechanism is a bimolecular (meaning that the transition state of the rate-limiting step involves two molecules) nucleophilic
    • substitution. It is a concerted reaction (meaning that it takes place in a single step with bonds breaking and forming at the same time).

    • Ex. 
  5. In order for a
    carbon atom to be attacked by a nucleophile in an Sn2 reaction, what properties must the carbon atom to be attacked have?
    • the carbon must be partially positive, it must
    • have a good leaving group, the carbon must not be sterically hindered
  6. what criteria
    must a chemical species meet in order to be a good leaving group?
    • it must have electron withdrawing pwoer, it must be stable once it has left (i.e. it is not a strong base), and it must be
    • polarizable to stabilize the transition state
  7. The stronger a
    nucleophile, the ____ the reaction in an Sn2 mechanism reaction
    faster
  8. Strong bases are
    strong _____, but not all ____ ____ are basic
    • strong bases are strong nucleophiles, but not
    • all strong nucleophiles are basic
  9. Of a conjugate
    acid-base pair, which is the stronger nucleophile?
    the base is the stronger nucleophile
  10. nucleophile strength _____ from left to right on the periodic table
    decreases, because more electronegative atoms are less likely to form new bonds

What would you like to do?

Home > Flashcards > Print Preview