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Resonance Trick Ortho Meta Para Addition EAS Intermediates

March 27, 2014 By Leah4sci 17 Comments

EAS resonance for ortho meta and para substituentsEAS Series: Video 10
Electrophilic Aromatic Substitution gets more difficult when the starting molecule is a substituted benzene. Not only do you have to know the reaction. You also have to know how the substituent will direct the incoming electrophile, and if the substituent will slow down (deactivate) or speed up (activate) the overall reaction.

But before you can tackle directing effects, you must have a very solid understanding of the reaction intermediates, particularly the resonance stabilized sigma complex for ortho, meta and para addition reactions.

The video below takes you through the detailed resonance intermediates to help you understand this concept, and then shows you my awesome shortcut because let's face it, do you really want to draw resonance for every quiz/exam question if you don't have to?

If you find the shortcut helpful (and time-saving) please let me know by leaving a comment below.


(Watch on YouTube: Ortho/Meta/Para. Click CC on bottom right for transcript.)

<โ€“ Watch Previous Video: Ortho Meta and Para Disubstituted Benzene Monster Trick
โ€“> Watch Next Video:
Activating Groups are Ortho/Para Directors

This is Video 10 in the Electrophilic Aromatic Substitution Video  Series. Click HERE for the entire series.

Filed Under: Electrophilic Aromatic Substitution Tagged With: EAS, electrophilic aromatic substitution, resonance

Comments

  1. asma says

    April 29, 2018 at 3:23 pm

    hello Leah whatever you are doing is amazing, i was wondering if there are any quizzes on this series?

    Reply
  2. Usama Shahbaz says

    July 5, 2016 at 5:40 pm

    Can you please put up a video that explains aromatic, anti aromatic, and non aromatic ! These videos are exactly what I need to help me understand!

    Reply
    • Leah4sci says

      August 4, 2016 at 1:00 pm

      Thank you so much. I have a written tutorial to answer your questions: https://leah4sci.com/aromaticity-tutorial-for-cyclic-charged-and-heterocyclic-aromatic-compounds/

      Reply
  3. Sarah says

    December 21, 2014 at 4:04 pm

    Leah, your videos helps me A LOT. I’m literally struggling with my grades now. And when you say “..your professor wont ask the complete mechanism..” well, that didnt happen in my test. Thats why I need to take the test again. Thank you, thank you so much. Keep making videos and teaching Leah. You’re such a great teacher :’)

    Reply
    • Leah4sci says

      May 7, 2015 at 7:06 pm

      Sarah most professors don’t. But since there are a few who do ask for it I do show it ๐Ÿ™‚
      Sucks that you have to take the test again. What happened on the first one?

      Reply
  4. rogieto says

    October 19, 2014 at 5:17 am

    thank you very very much for this video’s…GREAT JOB

    Reply
    • Leah4sci says

      October 19, 2014 at 3:32 pm

      Thank you, glad you found this trick helpful

      Reply
  5. jeevan says

    October 16, 2014 at 2:42 am

    can u upload a video on vandiumpentoxide mechanism in alkanes

    Reply
    • Leah4sci says

      October 16, 2014 at 9:05 pm

      I currently don’t have any plans to cover this topic. I’m working on a cyclohexane series right now

      Reply
  6. Jean-Louis says

    September 2, 2014 at 6:03 am

    useful video’s. Thank you

    Reply
    • Leah4sci says

      September 4, 2014 at 11:27 pm

      You’re welcome. Which topic are you currently working on?

      Reply
  7. Sakshi says

    August 11, 2014 at 4:11 am

    Thank you so much ..this helped me a lot in thinking logically …you are a great teacher ! ๐Ÿ™‚ ๐Ÿ™‚

    Reply
    • Leah4sci says

      August 11, 2014 at 7:46 am

      You are very welcome

      Reply
  8. nur says

    March 30, 2014 at 7:23 am

    can u upload the video about the acyl compound?? thank you

    Reply
    • Leah4sci says

      April 1, 2014 at 2:42 pm

      If you’re referring to Friedel-Crafts acylation the video is live right here: https://youtu.be/sa39KbsTmWI

      Reply
  9. Daouda says

    March 28, 2014 at 2:40 am

    I sincerely wanna thank you for all this video’s. You are doing a great job!

    Reply
    • Leah4sci says

      March 28, 2014 at 10:50 am

      Thank you Daouda. Which topics are you working on right now?

      Reply

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