Hydrohalogenation of Alkenes Video

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
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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!


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

    thank you

  2. 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.

  3. Martrevez Davis says

    Very helpful video. You’re #1!

  4. 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!

  5. elmin_moussa says

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

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

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

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

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

  9. 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!!!

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