Electrophilic Aromatic Substitution

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  • Опубліковано 3 січ 2015
  • Electrophilic Aromatic Substitution is one thing that benzene does. The mechanisms are getting trickier, no? Don't worry, practice makes perfect. From halogenation to Friedel-Crafts alkylation, this is a handy family of reactions.
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КОМЕНТАРІ • 137

  • @urania6299
    @urania6299 7 років тому +160

    These are basically the best chemistry videos I can find on youtube (including Khan academy). I'm in my second year of a part time OU science degree, I work 12 hours a day and I have 2 kids. These videos are especially helpful for using a precious spare 10 minutes I might have to find and get to grips with a particular subject very quickly. I feel good going into my exam and I feel as if I couldn't have done it without your help. Thank you very much Professor Dave!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 років тому +24

      thanks for the kind words! please tell everyone you know to subscribe!

    • @PunmasterSTP
      @PunmasterSTP Рік тому +2

      I know it's been a while, but I just came across your comment, and I hope you've been doing well! Also, how did your exam go?

  • @qhaweteyise1955
    @qhaweteyise1955 8 років тому +61

    You are the best chemistry teacher that has ever taught me...
    Salute from Rhodes University, South Africa...

    • @PunmasterSTP
      @PunmasterSTP Рік тому

      I know it's been seven years, but I just came across your comment and was curious. How'd the rest of your studies go there?

  • @Adel26.
    @Adel26. 5 років тому +47

    Doing Bsc Chemistry and having you as an online tutor is a blessing.

  • @sukhmankhuttan9460
    @sukhmankhuttan9460 2 роки тому +6

    Your videos are short and precise. You impart the required information in less time , which is so rare with chem teachers !

  • @xenog4386
    @xenog4386 3 роки тому +3

    You’re such a genius when comes to explaining the concept the easiest way possible.

  • @piyush9555
    @piyush9555 9 місяців тому

    I'm enlightened, I don't have any words for how outstanding your explanation is, you're my saviour

  • @D1ckator
    @D1ckator 6 років тому +11

    You are awesome, professor Dave. I very much appreciate what you do.

  • @hkksucks56
    @hkksucks56 7 років тому +5

    I had so many ahaa moments....oprah would be proud! Thank you for taking your time to make these videos!

  • @fredrickzoller5643
    @fredrickzoller5643 5 років тому +3

    You're a great source of knowledge Professor Dave! Thanks so much!

  • @haroun8332
    @haroun8332 8 років тому +5

    Great explanation, I'm watching all your videos and I found them very helpful, thanks for sharing your time

  • @madisonlynn7898
    @madisonlynn7898 5 років тому +27

    You're saving my life in organic right now! Much appreciated!!

  • @makeupxpq4055
    @makeupxpq4055 5 років тому +7

    You literally save my life every single time thank you soso much professor !

    • @PunmasterSTP
      @PunmasterSTP Рік тому

      How'd the rest of your classes go?

  • @klepmeta3396
    @klepmeta3396 Рік тому +1

    very simplified and well understood

  • @rambles2727
    @rambles2727 2 місяці тому

    Your videos are great for review where I can watch without needing to take notes. Then using the quizzes at the end to see if I truly understand. If not then I go to a less concise source and do deeper review and then come back :)

  • @devyndevyndevyn
    @devyndevyndevyn 4 місяці тому

    once again saving my life ilyyyyy professor dave

  • @modelaircraft12
    @modelaircraft12 9 років тому +1

    fantastic!
    thanks professor DAVE

  • @animeshmishra7613
    @animeshmishra7613 3 роки тому +1

    you just made my med school chem easy !!! Thanks you soo much !!!

  • @crypsisrosa9779
    @crypsisrosa9779 9 років тому +4

    Thank you for the example. It helped a lot!

    • @chemorgo5467
      @chemorgo5467 3 роки тому

      ua-cam.com/video/WwueVrKt7Ow/v-deo.html

  • @bashiruk2123
    @bashiruk2123 7 років тому +2

    what a great teacher hi to you from Nairobi university kenya

  • @georgewalker1632
    @georgewalker1632 3 роки тому

    So so helpful, thank you!!

  • @seasq
    @seasq 6 років тому +10

    You are why I feel like there's hope for me making an A in my OChem 2 course. Thank you thank you!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 років тому +6

      you can do it!

    • @PunmasterSTP
      @PunmasterSTP Рік тому +1

      If I might ask, did you indeed make an A?

    • @seasq
      @seasq Рік тому +1

      @PunmasterSTP lol I actually couldn't remember, and I went to digging for my transcript on my computer. I ended up with a B though.

    • @PunmasterSTP
      @PunmasterSTP Рік тому +1

      @@seasq Oh sorry, I didn't mean to make you go digging for your transcript! Either way, I think it's still cool that you ended up with a B 👍

    • @seasq
      @seasq Рік тому +1

      @PunmasterSTP lol no worries. It wasn't too hard to find since I recently went back to school for another degree. I'm happy I got that B too. It was an interesting but tough class.

  • @shivaniparmar7086
    @shivaniparmar7086 Рік тому +2

    You're a life saver 😄

  • @سمرمحمود000
    @سمرمحمود000 7 років тому +2

    you just made it so easy ^_^ ...thanks a lot

  • @kasondemumba3938
    @kasondemumba3938 8 років тому +4

    thanks alot prof but try to combine some tutorials to make a long one that can be followed nicely especially on reactions

  • @mahnoor2768
    @mahnoor2768 6 років тому +2

    Beessttttt explanation ever

  • @muhammad922
    @muhammad922 9 років тому +1

    Thanks prof.

  • @wtbgothgf
    @wtbgothgf 7 років тому +1

    Thank you!

  • @piyush9555
    @piyush9555 9 місяців тому

    wow, wow, wow, Dave sir, I'm enlightened thank you, you explained much better than my chemistry teacher

  • @Iinachanel1973k
    @Iinachanel1973k 3 роки тому +2

    The best explanation of EAS reactions! Thank you so much! xoxo

  • @madboycal7859
    @madboycal7859 2 роки тому +1

    Hello, Professor dave, great video! When the Br2 adds to the Ferric bromide, having the benzene attack the electrophilic bromine instead of the terminal would still be correct, right? We'd generate a bromide ion because the electrons would go to the nucleophilic bromine and the electrons donated to the ferric bromide would be given back to the electrophilic bromine.

  • @KarinaLopez-bg6gz
    @KarinaLopez-bg6gz 8 років тому +5

    Your videos are so helpful!
    Can you do a video on Nucleophilic Addition to the Carbonyl group and Nucleophilic Addiction-Elimination at the Acyl Carbon?

  • @younisyounis5686
    @younisyounis5686 4 роки тому +1

    Thank you so much 🙂
    Following you from Iraq 🇮🇶

  • @brightonhamusonde5080
    @brightonhamusonde5080 6 років тому +1

    great stuff

  • @Nikkunj
    @Nikkunj Рік тому

    thank you very much sir really helped me understand EAS

  • @dilafrose5498
    @dilafrose5498 6 місяців тому

    Professor dave, The best❤

  • @murkkhatri3550
    @murkkhatri3550 8 років тому

    can you please make a detailed video on the ether hydrolysis example questions.

  • @bettyochonma6520
    @bettyochonma6520 2 роки тому

    Woww
    Thanks for teaching ❤

  • @alderamin1402
    @alderamin1402 2 роки тому

    You are amazing

  • @ankittrivedi2904
    @ankittrivedi2904 5 років тому +1

    Great!

  • @jdavis8919
    @jdavis8919 5 років тому

    I love this guy.

  • @priti659
    @priti659 7 років тому

    please can you explain cine and ipso substitution?

  • @nasilelenasilele733
    @nasilelenasilele733 10 місяців тому

    what about the middle resonance structure , how does it form the product

  • @AmandaMagana
    @AmandaMagana 6 років тому +4

    dude you are iconic...please come teach at UCLA lol you actually make me understand

  • @salarsohail2068
    @salarsohail2068 8 років тому

    professor please do a tutorial about molecular orbital treatment of benzene . please

  • @rishiparwal5705
    @rishiparwal5705 3 роки тому +1

    Sir please explain generation of electrophile in nitrosyl chloride
    Why cl- forms while N is more electronegative

  • @poojajena3897
    @poojajena3897 8 років тому +1

    Good

  • @lisycyriac4689
    @lisycyriac4689 4 роки тому

    Can you make some videos on mechanism of halogen op directing

  • @wrestlemanialite8474
    @wrestlemanialite8474 5 років тому +1

    Good.

  • @rittenbrake1613
    @rittenbrake1613 6 років тому

    GOOD !

  • @divyavreddy4783
    @divyavreddy4783 3 роки тому

    Sir do a video on nitration of benzene and there resonance structure

  • @elijahangel2473
    @elijahangel2473 Рік тому

    Do you know what can break a Benzoapyrene Aromatic ring?

  • @songohan393
    @songohan393 4 роки тому

    I hope you will always be happy in life I wish you the best

  • @bernadetteg.tharngan4041
    @bernadetteg.tharngan4041 3 роки тому

    wow, i'm surprised that I got it. The explanations in the book just confused me even more. thank you.

  • @meso-iso4475
    @meso-iso4475 2 роки тому

    Professor please make video on GOC GENERAL ORGANIC CHEMISTRY {Main topics for jee }

  • @jaishreeramraomundkar1826
    @jaishreeramraomundkar1826 6 років тому +1

    Dave can be pronounced as Dev and in Hindi Dev means God. You are the best Chem teacher

  • @payaljoshi274
    @payaljoshi274 3 роки тому

    sir do you explain me adsorption complex???

  • @divyavreddy4783
    @divyavreddy4783 3 роки тому

    In nitration of benzene why does an electrophile attaches to the meta position rather than Ortho and para

  • @Thaumius
    @Thaumius 5 років тому

    Hey Dave, can AlBr3, BBr3 also work as catalysts if they are lewis acids?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 років тому +1

      hmm yes i believe i've seen AlBr3 being used, i think BF3 as well, i think those are pretty common!

  • @ahmedsserunkuma1170
    @ahmedsserunkuma1170 5 років тому

    thanks proffessor iwant to inquire about how the positive charge on the bromine dis appears

  • @bhavyayadav8498
    @bhavyayadav8498 8 років тому

    hey......sir felt great doing organic on my own all thanks to u. Can u explain why WOLF KISHNER REDUCTION more preferred over CLEMMENSON REDUCTION for ketones?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  8 років тому +3

      +Bhavya Yadav wolf kishner is under basic conditions using hydrazine, clemmenson is acidic conditions, so if the substrate is base-labile you want clemmenson, if it's acid labile you want wolf kishner, depends on the substrate in question.

  • @Alchemist_171
    @Alchemist_171 3 роки тому

    Professor if you're reading this comment then I urge you to add some more reactions to your organic chemistry playlist. Reactions of Degree level, that is. This stuff is high school level, very useful still we gonna need those additional reactions please! ;)

    • @Bronte866
      @Bronte866 10 місяців тому

      Did they teach spelling and grammar at your high school?

  • @abhisheknarwal3427
    @abhisheknarwal3427 3 роки тому +1

    Enough for jee or not???

  • @maxmustermannderaufrichtige
    @maxmustermannderaufrichtige 3 роки тому

    best intro ever

  • @Daniel-nu8uk
    @Daniel-nu8uk 9 років тому

    It would be great if you even added a video on Nucleophilic Aromatic Substitution...

  • @zikoszikoglou2347
    @zikoszikoglou2347 8 років тому

    What if we are presented with the reaction:
    Ar-E + H-A --> ?
    What is the product?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  8 років тому +2

      Hmm, I suppose it depends on the acid and the electrophile. Some acids might be strong enough to add to benzene, I suppose. But the group on the ring might react with the acid too, especially if it is a hydroxyl, amine, or carbonyl.

  • @leaxx7791
    @leaxx7791 3 роки тому

    you're awesome dude

  • @atharva302
    @atharva302 3 роки тому

    Sir i request you to solve problems of joint entrance exam 🙏 it will be helpful

  • @truthhurts986
    @truthhurts986 6 років тому +1

    Thank you very much. I love the way you explain.
    But I have a question, Why would FeBr3 and Br2 interact in the first place to begin with? Because by doing that they are creating unfavorable formal charges. Metals dont like to be negative and Nonmetals don't like to be positive. Fe is accepting e- and becoming negative and then its not liking it. Why would I put something in my mouth knowing I would not like it and then throw up? Lewis acid concept sounds like BS in this scenario.

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 років тому +3

      It's a good question! But remember that reactions don't have to be especially favorable to occur. That is to say that endothermic reactions will proceed, as long as a collision occurs with sufficient kinetic energy to overcome the activation barrier for that reaction. As for the analogy with the food, it doesn't hold, because you are sentient and molecules are not.

    • @NewWesternFront
      @NewWesternFront Рік тому

      and also the Br-Br bond is considerably weak, given the relatively large size of the atoms and the fragile, distant bond radius

  • @carlasalas1932
    @carlasalas1932 5 років тому +1

    Why can't Ochem teachers be clear like this... like are all ochem teacher all over the place?

  • @saranyachoosen3438
    @saranyachoosen3438 5 років тому

    i love you

  • @laibamalik5162
    @laibamalik5162 7 років тому

    NYC CCC video

  • @harishd37
    @harishd37 7 років тому

    Hey at about 7:45 ..
    You said benzene reacts with the bromine atom to the left as the bromine atom on the left gives electrons to the Br+ on the right. So wouldn't this bromine atom( the left one) become Br+ ?? coz one electron of the left bromine also goes to the right one?
    So in this reaction does Br+ react with benzene???!!
    and if it does.. how come bromonium ions react? And isn't it actually energitically unfavourable to rip apart an electron from Bromine (or chlorine) to convert it into Bromonium(or Chloronium) ion??
    This is confusing me..
    Pls explain in detail
    Thanks!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 років тому +1

      a pi bond from benzene coordinates to the bromine atom so it remains neutral!

    • @nicolamneck3507
      @nicolamneck3507 7 років тому

      sry I didnt know how to comment correctly.....
      nice video :) but I didnt get where the H-proton in step 3 was coming from ?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 років тому +1

      there's only two steps! you mean the second step, elimination? that proton is on the substrate, remember that in benzene every carbon has one hydrogen.

  • @mattflores8911
    @mattflores8911 2 роки тому

    Does professor Dave still answer his email?

  • @andreag8475
    @andreag8475 4 роки тому

    The real mvp

  • @roshinvarghese6879
    @roshinvarghese6879 5 років тому

    get that organic chapstick big boy. other than that thanks for helping me big boy

  • @wsgletschill
    @wsgletschill 2 місяці тому

    Thank you chemistry jesus

  • @chetansmart3730
    @chetansmart3730 5 років тому

    now i am cleared....at 3:40 thts the only doubt i had

  • @PunmasterSTP
    @PunmasterSTP Рік тому

    EAS? More like "Amazing lectures? Yes!"

  • @ibrhmmcht3907
    @ibrhmmcht3907 4 роки тому

    Are there any describtion of A? (Like E is Electrophilic)

  • @rubyazehra6864
    @rubyazehra6864 4 роки тому

    What is this positive charge for in Arenium ion? I'm not getting this

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  4 роки тому

      if the pi bond acts as a nucleophile then one of the carbons in benzene loses an electron domain

    • @rubyazehra6864
      @rubyazehra6864 4 роки тому

      Ohk.. carbon loses an electron domain so that bromine can be attached to the carbon right?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  4 роки тому +1

      Yep!

    • @rubyazehra6864
      @rubyazehra6864 4 роки тому

      @@ProfessorDaveExplains thanks alot

  • @harishd37
    @harishd37 7 років тому +1

    Also, another doubt.. If the formation of the co-ordinate bond between bromine and FeBr3 creates a formal charge that is energitically unstable. Then how come it does even happen??

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 років тому +3

      endothermic reactions happen all the time, it's just a matter of a collision occurring with sufficient kinetic energy so as to surpass the activation energy for the reaction.

  • @ricepop7469
    @ricepop7469 Рік тому

    Testing

    • @ricepop7469
      @ricepop7469 Рік тому

      Pi bonds interact w electrophile

    • @ricepop7469
      @ricepop7469 Рік тому

      Comparable to sn2

    • @ricepop7469
      @ricepop7469 Рік тому

      First step til the ion is formed is the same as addition. Addition is reverse of sn2

  • @annelou6082
    @annelou6082 3 роки тому

    Hi Prof gwapo keeyo.. hhahaha

  • @amitprajapati5648
    @amitprajapati5648 Рік тому

    Indian teacher are osm than foreigner

  • @bw6329
    @bw6329 3 роки тому

    Luv from pakistan

  • @exullgaming4911
    @exullgaming4911 3 роки тому +1

    epic games

  • @baby45oh7
    @baby45oh7 7 років тому

    why does Benzene Give electrophilic Substitution if its Unsaturated 😏

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 років тому +2

      doesn't have to do with saturation! it's because it's aromatic, so it tends to do reactions that allow for retention of aromaticity.

    • @baby45oh7
      @baby45oh7 7 років тому

      Professor Dave Explains Thankyuh So much😊

  • @atem1354
    @atem1354 4 місяці тому

    Thanks, I'm watching this on 2024

  • @rassimsimou1594
    @rassimsimou1594 8 місяців тому +1

    Good