1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Synthesis of 2-butyne from 2-butene

  1. Jul 4, 2012 #1
    1. The problem statement, all variables and given/known data
    I'm having a hard time deciding exactly what the mechanism would be for
    CH3CH=CHCH3→CH3C[itex]\equiv[/itex]CCH3


    2. Relevant equations



    3. The attempt at a solution
    My professor only explained half of the mechanism quickly assuming the rest would be obvious, so I know that it will start with a halogenation breaking the double bond before reforming the triple bond. My problem is whether only one equivalent of Br2 is needed or two before you are able to dehalogenate and form the triple bond. I'm also having a hard time figuring out why the bromines have be be added in the first place only to be taken off again. Also it seems that after the bromination there is a second step adding a catalyst (?) of either Zn or something that looks like +o- (t-butoxide?). Does this have any effect on the whether we need 2 or 4 bromines on the molecule before reducing? And what exactly makes the bromines come off to form the triple bond?
     
  2. jcsd
  3. Jul 5, 2012 #2
  4. Jul 5, 2012 #3
    Thanks
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Synthesis of 2-butyne from 2-butene
  1. E^2*pi*i, where from? (Replies: 11)

  2. 1,3-Butene or Butene (Replies: 7)

Loading...