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Hydrohalogenation of Alkenes Video

October 12, 2012 By Leah4sci 25 Comments

halohydrin formation alkene reaction mechanism tutorial videoAlkene Reactions Series: Video 2
Alkene Hydrohalogenation is the reaction in which a pi bond is broken and a halogen added to the more substituted or ‘Markovnikov' position.

 

(Watch on YouTube: Hydrohalogenation. Click cc on the bottom right for video transcription.)

<– Watch Previous Video: Introduction to Alkene Reactions
–> Watch Next Video: Halogenation of Alkenes

This is Video 2 in the Alkene Reaction Mechanisms Video Series. Click HERE for the entire series.

Ready to test your skills? Try the Alkene Reactions Practice Quiz after watching the series!

Filed Under: Organic Chemistry Tutorial Videos Tagged With: alkene, alkene reaction mechanism, curved arrow, electrophilic addition, h-x, hydrohalogenation, mechanism

Comments

  1. tani says

    June 14, 2019 at 12:35 am

    hey Leah do you discuss what causes something to be more stable in a different video ?

    Reply
  2. won says

    May 21, 2018 at 6:31 pm

    since it is SN1, the product will be racemic?

    Reply
  3. merna says

    April 13, 2017 at 5:34 pm

    thanks.
    i want to ask about steoreochemistry
    syn & anti
    i want to understand it

    Reply
  4. Kim says

    March 23, 2017 at 2:05 am

    I have been struggling with this for a long time and the way you explained it was so clear. Thank you so much!

    Reply
  5. Kamil says

    February 21, 2017 at 11:02 pm

    it was nice explanation!! but I’m confused how do you assign primary or tertiary molecule ?

    Reply
  6. Ben says

    October 20, 2016 at 12:21 am

    I get it now, the most stable carbocation (higher degrees) gets the halide

    thank you

    Reply
    • Ben says

      October 20, 2016 at 12:27 am

      but what if 2 carbocation have the same stability as in both have 2 degrees or both have 3 degrees?

      Reply
    • Leah4sci says

      October 20, 2016 at 12:22 pm

      You’re welcome, Ben!

      Reply
  7. Ben says

    October 20, 2016 at 12:07 am

    4 looks like orgo chem’s favorite number

    4 bonds around carbon

    F,Cl,Br,I
    4 halides

    Reply
  8. Araba says

    December 1, 2015 at 3:44 pm

    Hey Leah, I am confused on how you marked a 3 carbocation on the cyclopentane but it looks like a 2 carbocation. I was slightly confused on that part. Just want some clarification.

    Reply
    • Leah4sci says

      December 6, 2015 at 5:22 pm

      Which point in the video?

      Reply
    • Dhara says

      April 4, 2018 at 1:34 pm

      When you put the point of your pencil on the tertiary carbocation she mentioned in the video you will see that Cabon is connecte to 2 carbon atom in cyclopentene and on carbon atom pointing outwards(primary carbon atom in the video)

      Reply
  9. Martrevez Davis says

    November 15, 2015 at 3:01 pm

    Very helpful video. You’re #1!

    Reply
    • Leah4sci says

      November 16, 2015 at 2:58 pm

      Thank you Martrevez

      Reply
  10. Asma says

    November 3, 2015 at 6:01 pm

    Hey Leah, the video was really helpful but I’m confused about stereochemistry that results as part of alkene reactions. Do you discuss that in later videos? thanks!

    Reply
    • Leah4sci says

      November 4, 2015 at 2:40 pm

      I’ve covered that in a study hall video. Details: leah4sci.com/join

      Reply
  11. elmin_moussa says

    August 7, 2015 at 1:52 am

    thank you so much , what’s the role of CCl4 reagent in the hydrohalogenation of double bond ??

    Reply
    • Leah4sci says

      August 7, 2015 at 4:19 pm

      You’re welcome. CCl4 is an inert solvent, meaning it provides the ‘solution’ for the reaction but doesn’t actually react

      Reply
  12. Ehyas says

    June 8, 2015 at 3:44 pm

    i love you videos , they are so helpfull. thank you so much

    Reply
    • Leah4sci says

      June 10, 2015 at 8:49 pm

      Thank you. Are you in a summer course or preparing for the Fall?

      Reply
  13. Sam says

    February 19, 2015 at 11:53 pm

    Ma’am why is it that why peroxide is added along with HBr the product is formed following anti mark rule

    Reply
    • Leah4sci says

      February 21, 2015 at 12:41 pm

      There is no peroxide in this reaction

      Reply
  14. Leah4sci says

    December 17, 2012 at 5:28 pm

    Talesha, glad you found this video useful 🙂
    Hope your final went well

    Reply
  15. Talesha says

    October 24, 2012 at 1:39 am

    I give you two thumbs up!! I just cannot believe how helpful your videos are. I sit in class for hours and understand nothing I watch your videos or a few mintues and I unersand it SMH!!!

    Reply

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