Electrophilic Aromatic Substitution

[@urania6299]

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]

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

[@PunmasterSTP]

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]

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

[@PunmasterSTP]

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.]

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

[@fatehasultana143]

Which university

[@hemant9210]

Hair on my screen 😄

[@Sykoraz]

@@fatehasultana143 still asking ? 😂

[@PunmasterSTP]

@@Sykoraz I'm still asking too!

[@PunmasterSTP]

Out of curiosity, which university did you attend, and how did your classes go?

[@sukhmankhuttan9460]

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

[@xenog4386]

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

[@madisonlynn7898]

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

[@ProfessorDaveExplains]

my pleasure!

[@PunmasterSTP]

How'd the rest of your class go?

[@piyush9555]

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

[@hkksucks56]

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

[@makeupxpq4055]

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

[@PunmasterSTP]

How'd the rest of your classes go?

[@D1ckator]

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

[@seasq]

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

[@ProfessorDaveExplains]

you can do it!

[@PunmasterSTP]

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

[@seasq]

@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]

@@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]

@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.

[@rambles2727]

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 :)

[@fredrickzoller5643]

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

[@klepmeta3396]

very simplified and well understood

[@shivaniparmar7086]

You're a life saver 😄

[@Iinachanel1973k]

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

[@PunmasterSTP]

Yes, he makes things EASy!

[@animeshmishra7613]

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

[@crypsisrosa9779]

Thank you for the example. It helped a lot!

[@chemorgo5467]

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[@jaishreeramraomundkar1826]

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

[@wonthedon2737]

ok lets relax buddy

[@kasondemumba3938]

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

[@bashiruk2123]

what a great teacher hi to you from Nairobi university kenya

[@KarinaLopez-bg6gz]

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?

[@ProfessorDaveExplains]

+Karina Lopez i will add it to the list!

[@KarinaLopez-bg6gz]

Thanks!

[@BestclipShorts91]

Bro I am learning this from India excellent explanation ❤

[@piyush9555]

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

[@SourceCodeDeleted]

This is actually really well done!

[@devyndevyndevyn]

once again saving my life ilyyyyy professor dave

[@younisyounis5686]

Thank you so much 🙂 Following you from Iraq 🇮🇶

[@rishiparwal5705]

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

[@divyavreddy4783]

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

[@abhisheknarwal3427]

Enough for jee or not???

[@mahnoor2768]

Beessttttt explanation ever

[@madboycal7859]

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.

[@AmandaMagana]

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

[@kaustubhsawant001]

Thanks professor it helped me alot❤

[@carlasalas1932]

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

[@Nikkunj]

thank you very much sir really helped me understand EAS

[@truthhurts986]

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]

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]

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

[@divyavreddy4783]

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

[@modelaircraft12]

fantastic! thanks professor DAVE

[@سمرمحمود000]

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

[@dilafrose5498]

Professor dave, The best❤

[@murkkhatri3550]

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

[@lisycyriac4689]

Can you make some videos on mechanism of halogen op directing

[@elijahangel2473]

Do you know what can break a Benzoapyrene Aromatic ring?

[@Daniel-nu8uk]

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

[@ProfessorDaveExplains]

I will try to include that in the next round of updates!

[@nasilelenasilele733]

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

[@bernadetteg.tharngan4041]

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

[@georgewalker1632]

So so helpful, thank you!!

[@priti659]

please can you explain cine and ipso substitution?

[@maxmustermannderaufrichtige]

best intro ever

[@salarsohail2068]

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

[@wtbgothgf]

Thank you!

[@brightonhamusonde5080]

great stuff

[@meso-iso4475]

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

[@muhammad922]

Thanks prof.

[@roshinvarghese6879]

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

[@jdavis8919]

I love this guy.

[@Football99Avenue]

Good.

[@zikoszikoglou2347]

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

[@ProfessorDaveExplains]

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.

[@haroun8332]

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

[@harishd37]

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]

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

[@nicolamneck3507]

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]

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.

[@ahmedsserunkuma1170]

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

[@ProfessorDaveExplains]

it's neutralized when it gets the electrons from the Br-Br bond

[@payaljoshi274]

sir do you explain me adsorption complex???

[@alderamin1402]

You are amazing

[@bettyochonma6520]

Woww Thanks for teaching ❤

[@bhavyayadav8498]

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]

+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.

[@mattflores8911]

Does professor Dave still answer his email?

[@rubyxi9349]

you are the best

[@Alchemist_171]

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]

Did they teach spelling and grammar at your high school?

[@songohan393]

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

[@leaxx7791]

you're awesome dude

[@chemorgo5467]

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[@NewWesternFront]

thank

[@ibrhmmcht3907]

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

[@ibrhmmcht3907]

1:39 it doesnt matter

[@NewWesternFront]

he probably chose A for acid(Lewis)

[@PunmasterSTP]

EAS? More like "Amazing lectures? Yes!"

[@ankittrivedi2904]

Great!

[@disciplinedev]

Thank you chemistry jesus

[@chetansmart3730]

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

[@Thaumius]

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

[@ProfessorDaveExplains]

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

[@rubyazehra6864]

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

[@ProfessorDaveExplains]

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

[@rubyazehra6864]

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

[@ProfessorDaveExplains]

Yep!

[@rubyazehra6864]

@@ProfessorDaveExplains thanks alot

[@harishd37]

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]

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.

[@Abcdej_ha]

Any career advices for msc chemistry student 🥹?

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I can understand your pain 😂

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Good

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Indian teacher are osm than foreigner

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Learn from them than ?

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[@laibamalik5162]

NYC CCC video

[@ricepop7469]

Testing

[@ricepop7469]

Pi bonds interact w electrophile

[@ricepop7469]

Comparable to sn2

[@ricepop7469]

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

[@annelou6082]

Hi Prof gwapo keeyo.. hhahaha

[@baby45oh7]

why does Benzene Give electrophilic Substitution if its Unsaturated 😏

[@ProfessorDaveExplains]

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]

Professor Dave Explains Thankyuh So much😊

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