1. SDN Mobile is now free on iTunes and on the Google Play Store. Enjoy!
    Dismiss Notice
  2. Dismiss Notice
  3. This forum is for support and discussion only. Please promote test prep materials/services (including AMAs) in the Special Offers subforum only. Thanks!
    Dismiss Notice
  4. Guest, be sure to check out How To Get Into Dental School, our free downloadable PDF with step-by-step details for dental school applicants!
    Dismiss Notice

Free radical addition

Discussion in 'DAT Discussions' started by motivated dent, Jan 6, 2009.

  1. motivated dent

    2+ Year Member

    Joined:
    Dec 31, 2008
    Messages:
    36
    Likes Received:
    0
    Status:
    Pre-Dental
    On the first achiever test for number 84 it says that a free radical addition is anit and i looked in the orgo book and it's right. but i don't get why the HBr with hv is considered a free radical addition. wouldnt' it be considered a plan irradiation reaction with markovinikov addition? i thought that if the HBr includes a peroxide then it follows the anti addition.
     
    #1 motivated dent, Jan 6, 2009
    Last edited: Jan 6, 2009
  2. Sublimation

    5+ Year Member

    Joined:
    Jun 14, 2008
    Messages:
    574
    Likes Received:
    0
    Status:
    Pre-Dental
    I have yet to see the Q but any type of peroxide (used basically as a solvent) will form a antimarkovnikov addition, except in the case of HCl and HI. If you added HBr with no peroxide, and heat, you can expect a free radical reaction because the heat will cause the HBr to form a radical. [This is more commonly seen with Br2 or dihalides]. If you post the Q i can be of more help. :)
     

Share This Page