This is truly a gift to the community. What a wonderful teacher and method of conveying information, especially for information like this which can be difficult to visualize through just reading text.
This video came out when I was 3 years old, and today it has helped me understand what used to be weird-looking diagrams whose orbital counts didn't add up just 3 months ago. It's giving me the head start I need so I can use the extra time to learn more advanced stuff like how it ties together in things like biochemistry, which I'm really interested in. Thank you!
This is one of the finest teaching videos I have ever seen! WHAAAT a brilliant explanation of such a difficult concept but taught in such an amazingly simple manner...You are a true guru!! Loved this!
Hi.I'm really thankful for this vedio! I'm 13 yo' and I'm learning college chemistry & organic chemistry by Khan Academy application, and this is really good and useful😊😀😊
i went to other videos that gave me half the answer or half the help, and you ust tie everything together, you are a ABSOLUTELY great teacher, you ask and answer the questions that we're thinking trul one of te best teacher, better than my chem and she pretty good
Sal has an uncanny way of presenting things in a really clear way. Although he might use more sentences to describe a concept, in the end, you'll feel stupid for not understanding it in the first place lol
migeliiii Professors have to deal with whole rooms of stupid people. Here they dont have to deal with anyone. Things go faster when you dont have to deal with 15 morons asking questions they should know the answer to if they read the material BEFORE coming to class.
Greg, it comes down to the fact that electrons are defined by something called a wavefunction. The wavefunction is well, very much wavelike, and as such, the wave like nature of electrons allows them to act in very non-intuitive ways. Being able to mix s and p orbitals by making use of electron superposition for example. Carbon does follow the rules, only the rules are much more complicated than what we are taught in lower level chemistry courses. Hopefully that helps.
@norwayte As Richard Feynman says, "No one understands quantum mechanics". I understand where you are coming from. We live in this incredibly visual world, where we can see, taste, touch almost anything, for better or worse. Bonding IS very hard to visualize. The mathematics we use give us these shapes for orbitals, derived in part from the Schrodinger equation and probability density functions. I find comfort in not understanding QM yet, because it means we have more to learn.
Sal, I like how you subconsciously personify the things that you're talking about... "this guy"..."lonely electron"... etc. Great video, it really clarified pi bonding for me!
@norwayte But to try and answre your question, a regular microscope cannot see individual atoms, electron microscopes cannot either. In order to visualize individual atoms you must use an Atomic Force Microscope. Google that and you should get some "pictures" of atoms. Also, anthracene was just recently "photographed" using an AFM and it is pretty amazing looking, as it looks just like what we thought it did.
From Wiki, The symbol σ is the Greek letter sigma (s). When viewed down the bond axis, a σ MO resembles an s atomic orbital. The Greek letter π in their name refers to p orbitals, since the orbital symmetry of the pi bond is the same as that of the p orbital when seen down the bond axis. P orbitals usually engage in this sort of bonding.
I asked my ochem professor why pi bonded molecules couldn't rotate and he just said they don't because of the way it is bonded. Now I can conceptually see why through this lecture. makes a whole lot more sense lol
Nice and clear video, however one common misconception is that a pi bond is formed only when to (parallel) p bonds overlap. Which misses the point that sp^2 can also overlap to form a pi bond (as in Benzyne).
I’ve been looking all over for visual representations of orbitals. I should’ve known I’d find it here. Same place that helped me understand linguistics 👍
So, a pi bond is a double-half bond that 'nails' the bond from rotating like putting two nails in the ends of a piece of wood and the center to keep it from spinning around the center nail ("bond")?
GOD BLESS YOUR BLESSED SOUL FOR THESE VIDEOS
hahhahahahahhahaha
This is truly a gift to the community. What a wonderful teacher and method of conveying information, especially for information like this which can be difficult to visualize through just reading text.
This video came out when I was 3 years old, and today it has helped me understand what used to be weird-looking diagrams whose orbital counts didn't add up just 3 months ago. It's giving me the head start I need so I can use the extra time to learn more advanced stuff like how it ties together in things like biochemistry, which I'm really interested in. Thank you!
This is one of the finest teaching videos I have ever seen! WHAAAT a brilliant explanation of such a difficult concept but taught in such an amazingly simple manner...You are a true guru!! Loved this!
really helped me understand things i didn't understand in lecture. thanks!
Your organic chemistry playlist is the greatest playlist this world has ever witnessed!
Thank you so much. I have a huge chem exam in about 30 minutes and I could not figure out hybridization for the life of me. You saved my life on this.
The lecturer talked about this for an hour and I didn't understand. You make me get it in under 15 minutes. Thanks so much!
you are the reason why i am passing. my lecturer literally only provide revision.
looks like I'm not the only ARMY struggling with chemistry lol XD
Hi.I'm really thankful for this vedio! I'm 13 yo' and I'm learning college chemistry & organic chemistry by Khan Academy application, and this is really good and useful😊😀😊
am i the only one shedding manly tears?
manly tears are being shed
thank you, sal. thank you.
arigato
Good job Khan really clear thank you
bruh. you're like the bob ross of learning.
underrated comment
i went to other videos that gave me half the answer or half the help, and you ust tie everything together, you are a ABSOLUTELY great teacher, you ask and answer the questions that we're thinking trul one of te best teacher, better than my chem and she pretty good
Thank you so much! Everything is so much clearer now. The textbook doesn't help as much as your videos!
you absolute legend. Making chem easy to an engineering student who hates chem and loves maths! thank you Mr Khan
Sal has an uncanny way of presenting things in a really clear way. Although he might use more sentences to describe a concept, in the end, you'll feel stupid for not understanding it in the first place lol
You don't know how many lives you have saved. You are the real MVP, sir :')
thanks a lot! why can you tell in 15minutes what every chemie prof is not able to do in 4-5 hours?
migeliiii Professors have to deal with whole rooms of stupid people. Here they dont have to deal with anyone. Things go faster when you dont have to deal with 15 morons asking questions they should know the answer to if they read the material BEFORE coming to class.
possible.. but in my class there was nobody asking questions. just an italian prof trying to explain in french... :)
Greg, it comes down to the fact that electrons are defined by something called a wavefunction. The wavefunction is well, very much wavelike, and as such, the wave like nature of electrons allows them to act in very non-intuitive ways. Being able to mix s and p orbitals by making use of electron superposition for example. Carbon does follow the rules, only the rules are much more complicated than what we are taught in lower level chemistry courses. Hopefully that helps.
@norwayte As Richard Feynman says, "No one understands quantum mechanics". I understand where you are coming from. We live in this incredibly visual world, where we can see, taste, touch almost anything, for better or worse. Bonding IS very hard to visualize. The mathematics we use give us these shapes for orbitals, derived in part from the Schrodinger equation and probability density functions. I find comfort in not understanding QM yet, because it means we have more to learn.
THANK YOU! LIFTED A MASSIVE BURDEN OFF MY SHOULDERS!
May God lead you to the straight path for the good work you are doing !
A definite like for this video! You made everything so simple and easier than what my lecture did.
It never ceases to amaze me when I think about how much this guy knows. A true genius
so grateful for khan academy!
Sal, I like how you subconsciously personify the things that you're talking about... "this guy"..."lonely electron"... etc. Great video, it really clarified pi bonding for me!
thank you so much!!! omg this is the best explanation ive read
@norwayte But to try and answre your question, a regular microscope cannot see individual atoms, electron microscopes cannot either. In order to visualize individual atoms you must use an Atomic Force Microscope. Google that and you should get some "pictures" of atoms. Also, anthracene was just recently "photographed" using an AFM and it is pretty amazing looking, as it looks just like what we thought it did.
This man has made my life so much easier. Thank you.
Sal is the man, the love I feel for you is greater than any hydrogen bond. In a non-polar way of course...
you are a Genius instructor! thank you!
At last I understand those bonds!!! THANKS!!!
very helpful for visual learner like me, Thanks a lot Sal!
Cleared up a lot of questions I had, thanks a lot!
From Wiki,
The symbol σ is the Greek letter sigma (s). When viewed down the bond axis, a σ MO resembles an s atomic orbital.
The Greek letter π in their name refers to p orbitals, since the orbital symmetry of the pi bond is the same as that of the p orbital when seen down the bond axis. P orbitals usually engage in this sort of bonding.
Wow. Unbelievable. Been an undergrad for 3 years and never fully understood pi bonds until now. Phenomenal explanation
You taught the community 11 yrs ago which my teacher cant teach today.... And yeah i understood the key... Its visualization
I really wish you listed the video before and after this in the comments
Amazing, this is just a perfect explanation. Thanks for these videos!
I asked my ochem professor why pi bonded molecules couldn't rotate and he just said they don't because of the way it is bonded. Now I can conceptually see why through this lecture. makes a whole lot more sense lol
I don't understand how someone can dislike his videos
I love you Sal! And the rest of Khan Academy. Hopefully rich philanthropists can donate to this very wonderful project you have here at Khan Academy
IDK WHO YOU ARE....BUT YOU HAVE ENLIGHTENED MY LIFE...
sigh...I love you Khan. A big hug for you from across this screen.
Makes sense. Thanks!
GORGEOUS
Thank you so much, this clarified alot of things I had in mind ..
i can't believe i understood this but i did and im soooo happppyyy 😃😃😃😃😃 Thankyou sooooo Much 💟💟💟💟💟💟💟
Thanks a lot! this is the first video about sigma and pi bonds which I actually could understand and make sense of it. Great job!!!
unbelievable how helpful this is
Thanks Sal Bro
THANK YOU SO MUCH!!
You're amazing at explaining stuff mate
Thank you very much!! Really appreciate that
Amazing! Thank you so much for the clarity!
Now I think I understand a little more about Chemistry XD So many thanks to you
Nice and clear video, however one common misconception is that a pi bond is formed only when to (parallel) p bonds overlap. Which misses the point that sp^2 can also overlap to form a pi bond (as in Benzyne).
Because he is a GENIUS!
Well this is helpful for my gen chem
Such a pleasure to learn from Sal.
great video! probably one of the clearest explanations i've heard :)
I GOT IT!!! Thank you!
Perfect. That helped me a lot to understand it in perspective
this are all hypothetical.it is used to explain the structure of some molecules.so we haeve to assume a bit.
I learned a lot more watching one 15 minute video then I did when I wasted 2 hours reading about the same stuff in my textbook. -_- Thanks, man!
great explanation. keep up the awesomeness
@pyromanizak - chuckle., perhaps - in that exploring the natural world is rather energising.
nice gets me through ib chem
You are a genius. Thank you very much and god bless for this free quality education.
Thanks a ton Sal. Love from North Carolina.
This guy: God of Organic Chem right here!
Thnx a lot !!!! :)
Quiet Clear. Thanks :)
thank you so much! you save my life with your awesome video!
Thanks for the explaining it so clearly, so much easier to understand in the best way as possible.
Makes ucla profesors look like scrubs
+Mag unda fuck yeah bro i reviewed hole semester in few hours and almost completely got it
Awesome video sir
I was struggling with this bonds, but thanks to you its crystal clear now :)
Thanks a lot!
this really helps me a lot, thanks!
Very helpful.. Thanks for making this video, sir.
brilliant video, dont know what i would do without you!
if you can do a video about bonding and anti bonding, i will be eternally grateful
thumbs up so that Sal can see it
great vid !
Thank you for good lecture ;-)
your a life saver thx so much :3
please make a video on molecular orbital theory !!
Great!, Thanks!
Thank you so much!
i wish i could make million clons of Khan and spread them all over the world.
Jazakallah khair..sal... u always clear up my doubts...:D
Thank you!!
extremely well made, thank you
Thanks, very helpful
Wow, this was great
Thank you sir.❤
just a note. the Greek letter for P is actually Rho
I’ve been looking all over for visual representations of orbitals. I should’ve known I’d find it here. Same place that helped me understand linguistics 👍
omg this made so much sense
So, a pi bond is a double-half bond that 'nails' the bond from rotating like putting two nails in the ends of a piece of wood and the center to keep it from spinning around the center nail ("bond")?