PROFESSOR DAVE YOU'RE AWESOME! my professor at Colorado State tries explaining everything with resonance and partial charges but you made this so much simpler and comprehensive! READY TO CRUSH MY O CHEM FINAL. !!!!!! THANK YOU
I´m so glad I found your channel. If you ever want to come and teach Chemistry in Costa Rica I´ll find a way to get rid of my crappy professor and you can fill the spot. Thank you so much for making the video! I have a presentation tomorrow on Diels Alder Cycloaddition and I´m sure with your help I´m gonna rock :)
thanks for watching! i would love to travel and give talks and review sessions so let me know if that's something your university would be interested in arranging!
You are the best Organic Chemistry teacher on the internet, literally! I just wanted you to know. Anyways, I would also like to see a video explaining the MO theory a little more, but extremely well done:) Thanks!
Thank you very much for this professor! I've been trying to understand the stereochemistry of this reaction for months and now everything is clear thanks to you!
My O-chem book butchered and overcomplicated it's explanation of endo and exo. THANK YOU for knowing exactly how to explain it. I want to find whoever made my book and fight them. 2 pages! TWO FULL PAGES to explain endo and exo. Listen to this "In the Endo approach, the dienophile aligns with its electron withdrawing group substituent underneath the pi system or directly above it. When it reacts such that the pi electron orbitals of its electron withdrawing group align under (or above) the pi orbitals of the diene, the orientation of approach is called endo." and it carries on like this
I have seen this done with the diene being labeled 1-4 and the dienophile being labeled A & B, it creates less confusion on big rings. Thanks for your videos!
it should be known that the first two reactions shown would not actually work, unless under extreme conditions due to the diene and dienophile both having high electron density. An electron withdrawing group should be attached to on or the other.
also at the end of the video there were no electron withdrawing groups and this topic was not discussed even though it is extremely important to the reaction. The interaction between the forming pi bonds and the electron withdrawing group on the othe molecule is the reason that most reactions do proceed in an endo approach and is known as the endo rule. a great example of this is the reaction between anthracene and diethyl fumarate were these pi bond, EWG interactions actually determine regiospecificity of the product.
+david mastrippolito butadiene and ethene will go with some heat! but yes, it's true that withdrawing and donating groups are important to the kinetics of the reaction.
sir thank u for the tutorial and i am a high school student from India check out organic chemistry questions on IITJEE question paper.I learn a lot watching your videos...
Thanks a lot sir. I had a lot of problems regarding this topic. Can u please explain reaction between maleic anhydride and cyclopentadiene according to woodward hoffman rule and FMO. And please also explain woodward hoffman rule in a seperate lecture.
nope, none! you just put them together and it goes. sometimes you need a little heat but that's not a catalyst. the dienophile could be a variety of molecules, as can the product.
not really, just the diene and dienophile! sometimes the reaction mixture needs to be heated considerably, depending on the favorability of the particular reaction.
yeesh i forget, probably has something to do with alignment of orbitals, the p orbitals that overlap have to be in phase with one another, when the diene and dienophile approach each other. with the light stuff, usually a photon excites an electron to a higher orbital and that affects which one is the HOMO and which is the LUMO, i'd have to dig into some old stuff to remember exactly
+Manmeet Kundal just take four carbons from the edge of the anthracene (diene) and make a new six membered ring with ethene (dienophile), you'll get a bicyclic structure.
@@ProfessorDaveExplains I want to translate your words into Arabic into videos, some videos are translated, and others that TH-cam does not translate. If you can do this feature, I would be grateful.
Need OChem help? Find me and all the resources you need on Chemmunity: chemmunity.info/dave
In middle school we were all singing along to the bill nye intro, now in college we sing along to the professor dave intro xD
Dude this is my ringtone hahaha surely wakes me up
You know you like Professor Dave when you sing along to his song :)
This is great! Thanks for including the MO and explaining EVERYTHING to do with it instead of just the mechanism; it was so helpful.
He knows a lot about the science stuff. Professor Dave explains! wohoo
PROFESSOR DAVE YOU'RE AWESOME! my professor at Colorado State tries explaining everything with resonance and partial charges but you made this so much simpler and comprehensive! READY TO CRUSH MY O CHEM FINAL. !!!!!! THANK YOU
I´m so glad I found your channel. If you ever want to come and teach Chemistry in Costa Rica I´ll find a way to get rid of my crappy professor and you can fill the spot. Thank you so much for making the video! I have a presentation tomorrow on Diels Alder Cycloaddition and I´m sure with your help I´m gonna rock :)
thanks for watching! i would love to travel and give talks and review sessions so let me know if that's something your university would be interested in arranging!
Hey Professor Dave! I´ll email you so we can discuss the possibility. I would be very happy to show you my country.
I sudy molecular Biomedicine in Germany and your Vides help me so much!! Thanks alot.
You are the best Organic Chemistry teacher on the internet, literally! I just wanted you to know. Anyways, I would also like to see a video explaining the MO theory a little more, but extremely well done:) Thanks!
+david kastner thanks for the kind words! i am going to do more organic topics soon so i will add it to the list!
There is always a video, that can teach everything in 5 minutes. Thank you.
Thank you so much! I learned more in about 9 mins than I did in an hour of my orgo chem class :D
Thank you very much for this professor! I've been trying to understand the stereochemistry of this reaction for months and now everything is clear thanks to you!
Its video is the first i have seen by the Professor Dave, and i have to say... The intro is so precious for this dirty world! \°~°/
Thank you from Brazil!
I'm from India and i loved the way u explain thank u so much for this
Thanks Dave! your explanations are really really good.
My O-chem book butchered and overcomplicated it's explanation of endo and exo. THANK YOU for knowing exactly how to explain it. I want to find whoever made my book and fight them.
2 pages! TWO FULL PAGES to explain endo and exo. Listen to this "In the Endo approach, the dienophile aligns with its electron withdrawing group substituent underneath the pi system or directly above it. When it reacts such that the pi electron orbitals of its electron withdrawing group align under (or above) the pi orbitals of the diene, the orientation of approach is called endo." and it carries on like this
Its that time of the year!!! Appreciate the videos... You're an absolute lifesaver
Wow. We didn't go over this is a college level o-chem class, but it's very cool. Thank you.
This is beautiful.
Finally a video with a cyclic diene and dienophile
I have seen this done with the diene being labeled 1-4 and the dienophile being labeled A & B, it creates less confusion on big rings. Thanks for your videos!
You are very intelligent and great at explaining these concepts! Thanks!
So nicely organized and easy to understand! Thanks! =)
Dave, thanks so much! finally getting this!
Holy shit. You explained this so much better than my professor.
Thank you Chemistry Jesus!
Good explanation professor
Thank you professor Dave, that was an amazing explanation. :)
teaching style...perfect 👍
Thank you! You saved my life with this video!
you are an amazing teacher. love your videos
it should be known that the first two reactions shown would not actually work, unless under extreme conditions due to the diene and dienophile both having high electron density. An electron withdrawing group should be attached to on or the other.
also at the end of the video there were no electron withdrawing groups and this topic was not discussed even though it is extremely important to the reaction. The interaction between the forming pi bonds and the electron withdrawing group on the othe molecule is the reason that most reactions do proceed in an endo approach and is known as the endo rule. a great example of this is the reaction between anthracene and diethyl fumarate were these pi bond, EWG interactions actually determine regiospecificity of the product.
+david mastrippolito butadiene and ethene will go with some heat! but yes, it's true that withdrawing and donating groups are important to the kinetics of the reaction.
Another great video PD!
sir thank u for the tutorial and i am a high school student from India check out organic chemistry questions on IITJEE question paper.I learn a lot watching your videos...
Indians not needed here....he we are the ones who love the subject than memorising....
Thanks Dave!
YOU ARE AMAZING!!!
Thank you so much Professor Dave
thanks dave
finally ..... got it .... thanks a lot ..
it is very helpful for me...thank you professor
thank you for the clear explanation! So helpful :)
These dienes had me dyin 😂😂
i love you professor dave
Absolute hero!
Thanks a lot sir. I had a lot of problems regarding this topic. Can u please explain reaction between maleic anhydride and cyclopentadiene according to woodward hoffman rule and FMO. And please also explain woodward hoffman rule in a seperate lecture.
thank you so much. This channel help me a lot.
Dear prof..i am having a problem with one of the questions asked in a competitive exam..but its image based..can you help?
organics is killing me but you help me survive
Love watching your channel! Thank you so much :)
Great video.
thank you so much for all your videos!!!! ❤️
Thx to you i finally understand chemistry, as a chemistry student lol
Ur in which university??
@@andy0695 cologne, Germany :)
@@sarahm7286 ohh Nice sister ,,m a still 19 year undergraduate 😅, nice to meet u m from India
Not even in my syllabus! But that was fun to learn. Thanks! 😁
Thanks sir good explanation
Helps somewhat... still so difficult to picture sometimes though
Thank you so much, professor. Your videos save my life.
Good
Why don't I get professors like u in my college 😞
Thank you very Mach professor ❤️💕😊
thank you...
making my first ever youtube comment on a video to say youre amazing
THANK YOU!!!!!
this is whats up
What is endo rule for (4+2) cycle explain with example sir please..
Thanks!!!
How does one convert benzene to diene's and dienophiles?
Oh thanks professor dave.......:)
thank you lot
Just awesome :)
thanx
ur great rly. that helped me alot:*
Is there any catalyst involved in all these rxn? and what is the name of the dienophile, and the product?
nope, none! you just put them together and it goes. sometimes you need a little heat but that's not a catalyst. the dienophile could be a variety of molecules, as can the product.
Professor Dave Explains Thank you sir!
A good one
on your second example didn't you draw the exo reaktion but the endo product?
hmm at what time stamp? exo/endo only applies when the dienophile has a structure that can extend either under the diene or away from the diene
at around 5:40
@@pascalkoch953 You cannot tell if it is the endo or exo product unless you draw in the hydrogen atoms where the 2 rings connect.
Feels great to understand it all , from Jesus (PBUH) himself
Dienes must be in what particular geometry?
s-cis
thanks my prof 🥰🥰🤩🤩
love it
Sir,do we need any reagents for diels alder cyclo addition??
not really, just the diene and dienophile! sometimes the reaction mixture needs to be heated considerably, depending on the favorability of the particular reaction.
thank u sir
yoyoyo u the man homedog
Sir I want to know about reactivity of dienes when EWG or ERG is present across the double bond of dienes.
depends on whether it's reacting with a nucleophile or electrophile!
Professor Dave Explains
if the reaction happens with dienophile only
oh right this is on Diels Alder, i didn't check the context. as far as i'm aware the rate only increases if there is one of each present
why is there a red star?
The shirt looked pretty bare, I thought I'd decorate it.
What is the difference between thermal and photochemical reaction
thermal = heat, photo = light!
I know this .... but when we say it is thermal or light reaction possible or not possible
Or what is the difference in terms of mechanism
I mean..thermal and photochemical cycloaddition reaction
yeesh i forget, probably has something to do with alignment of orbitals, the p orbitals that overlap have to be in phase with one another, when the diene and dienophile approach each other. with the light stuff, usually a photon excites an electron to a higher orbital and that affects which one is the HOMO and which is the LUMO, i'd have to dig into some old stuff to remember exactly
Okay, thank you very much for your response
i love you
hi.sir I want to know. steriochemistry especially confermers
+ubaid ullah i've got tutorials on that, check them out!
u the real nigga dave
anthracene + ethene → ?? in diels alder reaction
please answer
tq
+Manmeet Kundal just take four carbons from the edge of the anthracene (diene) and make a new six membered ring with ethene (dienophile), you'll get a bicyclic structure.
Can ethene react with the 2nd ring of anthracene to form the ring?
+Manmeet Kundal actually it seems like it is exclusively the middle ring that reacts.
+Professor Dave Explains thank u sir
i am a high school student in India , check out the IITJEE exam chemistry paper
teach me for ICho
👌🏼
you really gotta button up that shirt
I derive all of my power from my chest hair, so unfortunately I can't comply with this request.
Leave his chestfro alone! It may run down to his ball fro who knows...
oh, it does.
I have a crush on u professor
U look like ranbir kappor
😂🤭
اريد ترجمه بالعربي
Please submit subtitles!
@@ProfessorDaveExplains I want to translate your words into Arabic into videos, some videos are translated, and others that TH-cam does not translate. If you can do this feature, I would be grateful.
All subtitles are submitted by viewers, feel free to add Arabic subtitles to any video!
@@ProfessorDaveExplains thank you, l took it from your time😊
❤