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Free radical addition

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

  1. motivated dent

    2+ Year Member

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    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
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  3. Sublimation

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    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. :)
     

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