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

@friendlytutor8891

2 жыл бұрын

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.

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!

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

Thanks Dave! your explanations are really really good.

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!

@ProfessorDaveExplains

8 жыл бұрын

+david kastner thanks for the kind words! i am going to do more organic topics soon so i will add it to the list!

Thank you professor Dave, that was an amazing explanation. :)

Its that time of the year!!! Appreciate the videos... You're an absolute lifesaver

So nicely organized and easy to understand! Thanks! =)

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 :)

@ProfessorDaveExplains

7 жыл бұрын

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!

@marianagutierrezhernandez2784

7 жыл бұрын

Hey Professor Dave! I´ll email you so we can discuss the possibility. I would be very happy to show you my country.

Thank you so much! I learned more in about 9 mins than I did in an hour of my orgo chem class :D

There is always a video, that can teach everything in 5 minutes. Thank you.

Dave, thanks so much! finally getting 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!

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! \°~°/

Love watching your channel! Thank you so much :)

thank you so much for all your videos!!!! ❤️

you are an amazing teacher. love your videos

You are very intelligent and great at explaining these concepts! Thanks!

thank you for the clear explanation! So helpful :)

it is very helpful for me...thank you professor

Thank you! You saved my life with this video!

Another great video PD!

thank you so much. This channel help me a lot.

Wow. We didn't go over this is a college level o-chem class, but it's very cool. Thank you.

Thank you so much Professor Dave

Thank you so much, professor. Your videos save my life.

Thank you from Brazil!

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.

Good explanation professor

This is beautiful.

Thanks Dave!

Not even in my syllabus! But that was fun to learn. Thanks! 😁

teaching style...perfect 👍

Great video.

Thanks sir good explanation

I'm from India and i loved the way u explain thank u so much for this

ur great rly. that helped me alot:*

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

THANK YOU!!!!!

These dienes had me dyin 😂😂

Thank you very Mach professor ❤️💕😊

finally ..... got it .... thanks a lot ..

Finally a video with a cyclic diene and dienophile

thanks dave

YOU ARE AMAZING!!!

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...

@abhijithanilkumar4959

5 жыл бұрын

Indians not needed here....he we are the ones who love the subject than memorising....

Holy shit. You explained this so much better than my professor.

Thanks!!!

Absolute hero!

thank you...

thank you lot

What is endo rule for (4+2) cycle explain with example sir please..

Just awesome :)

How does one convert benzene to diene's and dienophiles?

i love you professor dave

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.

@davidmastrippolito8972

8 жыл бұрын

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.

@ProfessorDaveExplains

8 жыл бұрын

+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.

thanx

love it

A good one

Oh thanks professor dave.......:)

Dear prof..i am having a problem with one of the questions asked in a competitive exam..but its image based..can you help?

Helps somewhat... still so difficult to picture sometimes though

thanks my prof 🥰🥰🤩🤩

Good

Hi Professor. There is a new pi-bond forming in the diene. But, the p-orbital are not in the same phase. How is it possible ? Are they making a pi*-bond ? How is it energetically favorable ? Thanks a lot for your videos, you're helping me a lot :)

@ProfessorDaveExplains

6 жыл бұрын

the orbitals do work out! there is a moment in this clip where i briefly depict the orbital interactions, the molecules must be parallel for the overlap to occur.

@TheMasChain

6 жыл бұрын

Professor Dave Explains Thanks for your answer ! But I'm actually speaking about the new pi-bond forming between the Carbon (2) and the Carbon (3) of the initial diene ! Right where the new (and the only) double bond is.

@ProfessorDaveExplains

6 жыл бұрын

Oh I see, hmm, I don't recall actually! Maybe phases are changing in the transition state or something, as electrons from the HOMO of the diene go to the LUMO of the dienophile, maybe that changes the number of nodes or something and those two p orbitals become in phase. Haha honestly I don't remember at all!

@TheMasChain

6 жыл бұрын

No problem ! :-)

Sir I want to know about reactivity of dienes when EWG or ERG is present across the double bond of dienes.

@ProfessorDaveExplains

7 жыл бұрын

depends on whether it's reacting with a nucleophile or electrophile!

@Anuj-tiwari

7 жыл бұрын

Professor Dave Explains if the reaction happens with dienophile only

@ProfessorDaveExplains

7 жыл бұрын

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 don't I get professors like u in my college 😞

Is there any catalyst involved in all these rxn? and what is the name of the dienophile, and the product?

@ProfessorDaveExplains

6 жыл бұрын

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.

@vineshravindran9208

6 жыл бұрын

Professor Dave Explains Thank you sir!

Dienes must be in what particular geometry?

@ProfessorDaveExplains

4 жыл бұрын

s-cis

on your second example didn't you draw the exo reaktion but the endo product?

@ProfessorDaveExplains

7 жыл бұрын

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

@pascalkoch953

7 жыл бұрын

at around 5:40

@liambuchan4162

2 жыл бұрын

@@pascalkoch953 You cannot tell if it is the endo or exo product unless you draw in the hydrogen atoms where the 2 rings connect.

hi.sir I want to know. steriochemistry especially confermers

@ProfessorDaveExplains

8 жыл бұрын

+ubaid ullah i've got tutorials on that, check them out!

organics is killing me but you help me survive

Sir,do we need any reagents for diels alder cyclo addition??

@ProfessorDaveExplains

8 жыл бұрын

not really, just the diene and dienophile! sometimes the reaction mixture needs to be heated considerably, depending on the favorability of the particular reaction.

@balaajisrin.k9365

7 жыл бұрын

thank u sir

Thx to you i finally understand chemistry, as a chemistry student lol

@andy0695

2 жыл бұрын

Ur in which university??

@sarahm7286

2 жыл бұрын

@@andy0695 cologne, Germany :)

@andy0695

2 жыл бұрын

@@sarahm7286 ohh Nice sister ,,m a still 19 year undergraduate 😅, nice to meet u m from India

teach me for ICho

why is there a red star?

@ProfessorDaveExplains

5 жыл бұрын

The shirt looked pretty bare, I thought I'd decorate it.

👌🏼

i love you

What is the difference between thermal and photochemical reaction

@ProfessorDaveExplains

6 жыл бұрын

thermal = heat, photo = light!

@nourel-houdadegachi3673

6 жыл бұрын

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

@nourel-houdadegachi3673

6 жыл бұрын

I mean..thermal and photochemical cycloaddition reaction

@ProfessorDaveExplains

6 жыл бұрын

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

@nourel-houdadegachi3673

6 жыл бұрын

Okay, thank you very much for your response

anthracene + ethene → ?? in diels alder reaction please answer tq

@ProfessorDaveExplains

8 жыл бұрын

+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.

@manmeetkundal4879

8 жыл бұрын

Can ethene react with the 2nd ring of anthracene to form the ring?

@ProfessorDaveExplains

8 жыл бұрын

+Manmeet Kundal actually it seems like it is exclusively the middle ring that reacts.

@manmeetkundal4879

8 жыл бұрын

+Professor Dave Explains thank u sir i am a high school student in India , check out the IITJEE exam chemistry paper

yoyoyo u the man homedog

❤

this is whats up

making my first ever youtube comment on a video to say youre amazing

u the real nigga dave

Thank you Chemistry Jesus!

اريد ترجمه بالعربي

@ProfessorDaveExplains

4 жыл бұрын

Please submit subtitles!

@marowashhab2672

4 жыл бұрын

@@ProfessorDaveExplains I want to translate your words into Arabic into videos, some videos are translated, and others that KZread does not translate. If you can do this feature, I would be grateful.

@ProfessorDaveExplains

4 жыл бұрын

All subtitles are submitted by viewers, feel free to add Arabic subtitles to any video!

@marowashhab2672

4 жыл бұрын

@@ProfessorDaveExplains thank you, l took it from your time😊

U look like ranbir kappor

@Chempeep

2 жыл бұрын

😂🤭

you really gotta button up that shirt

@ProfessorDaveExplains

7 жыл бұрын

I derive all of my power from my chest hair, so unfortunately I can't comply with this request.

@MrHuddo

7 жыл бұрын

Leave his chestfro alone! It may run down to his ball fro who knows...

@ProfessorDaveExplains

7 жыл бұрын

oh, it does.

I have a crush on u professor

Feels great to understand it all , from Jesus (PBUH) himself